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Android 6.0 Camera2 源码分析（1）不同的activity界面

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Camera2中主要的activity

activity都在AnroidManifest.xml中有注册。我们先通过AndroidManifest.xml来大概的了解下都有哪些activity

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest    xmlns:android="http://schemas.android.com/apk/res/android"    package="com.android.camera2">    <uses-sdk        android:minSdkVersion="19"        android:targetSdkVersion="23" />    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.BIND_WALLPAPER" />    <uses-permission android:name="android.permission.CAMERA" />    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.NFC" />    <uses-permission android:name="android.permission.READ_SYNC_SETTINGS" />    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />    <uses-permission android:name="android.permission.RECORD_AUDIO" />    <uses-permission android:name="android.permission.SET_WALLPAPER" />    <uses-permission android:name="android.permission.SUBSCRIBED_FEEDS_READ" />    <uses-permission android:name="android.permission.SUBSCRIBED_FEEDS_WRITE" />    <uses-permission android:name="android.permission.USE_CREDENTIALS" />    <uses-permission android:name="android.permission.VIBRATE" />    <uses-permission android:name="android.permission.WAKE_LOCK" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.WRITE_MEDIA_STORAGE" />    <uses-permission android:name="android.permission.WRITE_SETTINGS" />    <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" />    <supports-screens        android:anyDensity="true"        android:largeScreens="true"        android:normalScreens="true"        android:smallScreens="false" />    <application        android:name="com.android.camera.app.CameraApp"        android:hardwareAccelerated="true"        android:icon="@mipmap/logo_camera_color_44in48dp"        android:label="@string/app_name"        android:largeHeap="true"        android:restoreAnyVersion="true"        android:supportsRtl="true"        android:theme="@style/Theme.Camera"        android:usesCleartextTraffic="false" >        <activity            android:name="com.android.camera.CameraActivity"            android:clearTaskOnLaunch="true"            android:configChanges="orientation|screenSize|keyboardHidden"            android:label="@string/app_name"            android:launchMode="singleTask"            android:taskAffinity="com.android.camera.CameraActivity"            android:theme="@style/Theme.Camera"            android:windowSoftInputMode="stateAlwaysHidden|adjustPan"            android:screenOrientation="portrait" >            <intent-filter>                <action android:name="android.media.action.STILL_IMAGE_CAMERA" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <meta-data                android:name="com.android.keyguard.layout"                android:resource="@layout/keyguard_widget" />        </activity>        <activity                android:name="com.android.camera.PermissionsActivity"                android:configChanges="orientation|screenSize|keyboardHidden"                android:label="@string/app_name"                android:excludeFromRecents="true"                android:parentActivityName="com.android.camera.CameraActivity" >            <meta-data                    android:name="android.support.PARENT_ACTIVITY"                    android:value="com.android.camera.CameraActivity" />        </activity>        <activity-alias            android:name="com.android.camera.CameraLauncher"            android:label="@string/app_name"            android:targetActivity="com.android.camera.CameraActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.DEFAULT" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity-alias>        <activity            android:name="com.android.camera.CaptureActivity"            android:label="@string/app_name"            android:theme="@style/Theme.Camera"            android:configChanges="orientation|screenSize|keyboardHidden"            android:windowSoftInputMode="stateAlwaysHidden|adjustPan"            android:screenOrientation="portrait">            <intent-filter>                <action android:name="android.media.action.IMAGE_CAPTURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity>        <!-- Video camera and capture use the Camcorder label and icon. -->        <activity-alias            android:name="com.android.camera.VideoCamera"            android:label="@string/video_camera_label"            android:targetActivity="com.android.camera.CaptureActivity">            <intent-filter>                <action android:name="android.media.action.VIDEO_CAMERA" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.media.action.VIDEO_CAPTURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity-alias>        <activity            android:name="com.android.camera.SecureCameraActivity"            android:clearTaskOnLaunch="true"            android:configChanges="orientation|screenSize|keyboardHidden"            android:excludeFromRecents="true"            android:label="@string/app_name"            android:taskAffinity="com.android.camera.SecureCameraActivity"            android:theme="@style/Theme.SecureCamera"            android:windowSoftInputMode="stateAlwaysHidden|adjustPan" >            <intent-filter>                <action android:name="android.media.action.STILL_IMAGE_CAMERA_SECURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.media.action.IMAGE_CAPTURE_SECURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <meta-data                android:name="com.android.keyguard.layout"                android:resource="@layout/keyguard_widget" />        </activity>        <activity            android:name="com.android.camera.settings.CameraSettingsActivity"            android:label="@string/mode_settings"            android:theme="@style/Theme.CameraSettings"            android:configChanges="keyboardHidden|orientation|screenSize">        </activity>        <receiver android:name="com.android.camera.DisableCameraReceiver">            <intent-filter>                <action android:name="android.intent.action.BOOT_COMPLETED" />            </intent-filter>        </receiver>        <!-- UCamera Configure Start -->       <activity            android:name="com.ucamera.uphoto.ImageEditControlActivity"            android:label="@string/text_uphoto_label"            android:launchMode="singleTop"            android:screenOrientation="portrait"            android:taskAffinity="com.ucamera.ucam.UPhoto" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.SPRD_EDITOR" />                <category android:name="android.intent.category.DEFAULT" />                <data android:mimeType="image/*" />            </intent-filter>            <!-- <intent-filter>                <action android:name="android.intent.action.SEND" />                <data android:mimeType="image/*" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.EDIT" />                <data android:mimeType="image/*" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.CREATE_SHORTCUT" />            </intent-filter> -->            <intent-filter>                <action android:name="android.intent.action.UGALLERY_EDIT" />                <data android:mimeType="image/*" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity>        <activity            android:name="com.ucamera.ucomm.downloadcenter.DownloadCenterActivity"            android:launchMode="singleTask"            android:screenOrientation="portrait" />        <activity            android:name="com.ucamera.ucomm.downloadcenter.DownloadTabActivity"            android:launchMode="singleTask"            android:screenOrientation="portrait" />        <activity            android:name="com.ucamera.ucomm.puzzle.PuzzleActivity"            android:launchMode="singleTop"            android:screenOrientation="portrait" >        </activity>        <activity            android:name="com.ucamera.uphoto.exception.MailSenderActivity"            android:theme="@android:style/Theme.NoDisplay" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.EMBED" />            </intent-filter>        </activity>        <!-- UGallery -->        <activity android:name="com.ucamera.uphoto.CropImage" />        <!-- SPRD:fix bug533979 unmount SD card, imageGallery can not select photo -->        <activity            android:name="com.ucamera.ugallery.ImageGallery"            android:configChanges="orientation|keyboardHidden"            android:label="@string/text_ugallery_name"            android:launchMode="singleTop"            android:screenOrientation="portrait" >            <!-- <intent-filter>                <action android:name="android.intent.action.GET_CONTENT" />                <category android:name="android.intent.category.OPENABLE" />                <category android:name="android.intent.category.DEFAULT" />                <data android:mimeType="image/*" />                <data android:mimeType="vnd.android.cursor.dir/image" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.PICK" />                <category android:name="android.intent.category.DEFAULT" />                <data android:mimeType="image/*" />                <data android:mimeType="vnd.android.cursor.dir/image" />            </intent-filter> -->        </activity>        <activity            android:name="com.ucamera.ugallery.BaseImagePicker"            android:configChanges="orientation|keyboardHidden"            android:screenOrientation="portrait" />        <activity            android:name="com.ucamera.ugallery.ViewImage"            android:configChanges="orientation|keyboardHidden" >            <intent-filter>                <action android:name="android.intent.action.UGallery.ViewImage" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <!-- <intent-filter>                <action android:name="android.intent.action.VIEW" />                <category android:name="android.intent.category.DEFAULT" />                <data android:mimeType="image/*" />            </intent-filter> -->        </activity>        <activity            android:name="com.ucamera.ugallery.DefaultImagePicker"            android:screenOrientation="portrait" >        </activity>        <activity            android:name="com.ucamera.ucomm.puzzle.PuzzleImagePicker"            android:screenOrientation="portrait" >            <intent-filter>                <action android:name="android.intent.action.SPRD_PUZZLE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity>         <activity            android:name="com.ucamera.ugallery.CollageSingleImagePicker"            android:screenOrientation="portrait" >        </activity>        <activity            android:name="com.ucamera.ugallery.CropImage"            android:configChanges="orientation|keyboardHidden"            android:process=":CropImage" >            <!-- fix bug462452 <intent-filter>                <action android:name="com.android.camera.action.CROP" />                <data android:mimeType="image/*" />                <category android:name="android.intent.category.DEFAULT" />                <category android:name="android.intent.category.ALTERNATIVE" />                <category android:name="android.intent.category.SELECTED_ALTERNATIVE" />            </intent-filter> -->        </activity>        <activity            android:name="com.ucamera.ugallery.preference.UGalleryPreferenceActivity"            android:screenOrientation="portrait" />        <activity android:name="com.ucamera.ugallery.CollageImagePickerActivity"            android:configChanges="orientation|keyboardHidden|screenSize"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" />        <activity android:name="com.ucamera.ugallery.panorama.UgalleryPanoramaActivity"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"            android:screenOrientation="landscape">        </activity>        <activity android:name="com.ucamera.ugallery.Wallpaper"            android:label="@string/ugallery_setas_wallpaper"            android:configChanges="orientation|keyboardHidden"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen">            <!-- <intent-filter>                <action android:name="android.intent.action.SET_WALLPAPER" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.ATTACH_DATA" />                <category android:name="android.intent.category.DEFAULT" />                <data android:mimeType="image/*" />            </intent-filter> -->        </activity>        <activity            android:name="com.ucamera.ugallery.video.MovieView"            android:configChanges="orientation|screenSize"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >        </activity>        <activity android:name = "com.ucamera.ugallery.MyFullDialogActivity"            android:screenOrientation="portrait"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"            />        <activity android:name = "com.ucamera.ugallery.GifPlayerActivity"            android:screenOrientation="portrait"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"            />        <activity android:name="com.ucamera.ugallery.MailSenderActivity"            android:theme="@android:style/Theme.NoDisplay">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.EMBED" />            </intent-filter>        </activity>        <!-- SNS --><!--         <activity --><!--             android:name="com.ucamera.ucomm.sns.ShareActivity" --><!--             android:configChanges="orientation|screenSize|keyboardHidden|navigation" --><!--             android:screenOrientation="portrait" --><!--             android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" > --><!--             <intent-filter> --><!--                 <action android:name="android.intent.action.UGALLERY_SHARE" /> --><!--                 <data android:mimeType="image/*" /> --><!--                 <category android:name="android.intent.category.DEFAULT" /> --><!--             </intent-filter> --><!--         </activity> -->        <activity            android:name="com.ucamera.ucomm.sns.AccountsActivity"            android:screenOrientation="portrait"            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" /><!--         <activity --><!--             android:name="com.tencent.tauth.AuthActivity" --><!--             android:launchMode="singleTask" --><!--             android:noHistory="true" > --><!--             <intent-filter> --><!--                 <action android:name="android.intent.action.VIEW" /> --><!--                 <category android:name="android.intent.category.DEFAULT" /> --><!--                 <category android:name="android.intent.category.BROWSABLE" /> --><!--                 <data android:scheme="tencent100247210" />100380359 100381104 222222 --><!--             </intent-filter> --><!--         </activity> -->        <activity android:name="com.tencent.connect.common.AssistActivity"             android:theme="@android:style/Theme.Translucent.NoTitleBar"             android:screenOrientation="portrait"/>        <activity android:name="com.tencent.plus.ImageActivity" />        <!-- fix bug527736 Some Activity about UCamera lacks method of checkpermission -->        <activity            android:name="com.ucamera.ucam.modules.ugif.GifBrowser"            android:launchMode="singleTop"            android:screenOrientation="portrait" />        <activity            android:name="com.ucamera.ucam.modules.ugif.GifPlayActivity"            android:label="@string/text_gif_play_label"            android:screenOrientation="portrait" >        </activity>        <activity            android:name="com.ucamera.ucam.modules.ugif.edit.GifEditActivity"            android:configChanges="locale|layoutDirection|orientation"            android:launchMode="singleTop"            android:screenOrientation="portrait" />        <provider            android:name="com.ucamera.ugallery.provider.UCamDataProvider"            android:authorities="com.ucamera.uphoto.provider"            android:grantUriPermissions="true" />        <!-- UGallery END -->    </application>    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />    <uses-permission android:name="android.permission.READ_LOGS" /><!-- UCamera Configure end --></manifest>

主要的activity

从上面的AndroidManifest.xml中可以看到，主要包括的activity：

  1. CameraActivity
  2. PermissionsActivity
  3. CaptureActivity
  4. VideoCamera
  5. SecureCameraActivity
  6. CameraSettingsActivity
  7. ImageEditControlActivity
  8. 以及部分ucamera中的activity，这里不做分析

不同activity的主要功能

1. CameraActivity

相机的主界面，我们通过launcher进入camera后，展现给我们的相机预览，录像预览界面。后面会详细分析。此处暂时pass

2.PermissionsActivity

顾名思义，主要是为了设置权限的界面。
关于PermissionsActivity的调用：
在CameraActivity.java中，在进入相机时，系统会首先check 权限是否ok。
onCreateTasks()

    @Override    public void onCreateTasks(Bundle state) {        Log.i(TAG, "onCreateTasks start!");        UiUtils.initialize(this);        Profile profile = mProfiler.create("CameraActivity.onCreateTasks").start();        CameraPerformanceTracker.onEvent(CameraPerformanceTracker.ACTIVITY_START);        if (UCamUtill.isTimeStampEnable()) {            ImageProcessJni.SetJNISOPath("/system/lib/");        }        mOnCreateTime = System.currentTimeMillis();        mAppContext = getApplicationContext();        mMainHandler = new MainHandler(this, getMainLooper());        mLocationManager = new LocationManager(mAppContext);        mOrientationManager = new OrientationManagerImpl(this, mMainHandler);        mSettingsManager = getServices().getSettingsManager();        mSoundPlayer = new SoundPlayer(mAppContext);        mFeatureConfig = OneCameraFeatureConfigCreator.createDefault(getContentResolver(),                getServices().getMemoryManager());        mFatalErrorHandler = new FatalErrorHandlerImpl(this);        if (!isCaptureIntent()) {            Log.d(TAG,"checkPermissions start");            //判断权限，是否打开PermissionsActivity.java            checkPermissions();            if (!mHasCriticalPermissions) {                Log.v(TAG, "onCreate: Missing critical permissions.");                finish();                return;            }        }        profile.mark();

onResumeTasks()

    @Override    public void onResumeTasks() {        Log.i(TAG, "onResumeTasks start!");        mPaused = false;        //判断权限。        checkPermissions();        if (!mHasCriticalPermissions) {            Log.i(TAG, "onResume: Missing critical permissions.");            /**             * SPRD:fix bug519999 Create header photo, pop permission error             * original code             * finish();             */            return;        }
  private void checkPermissions() {        if (!ApiHelper.isMOrHigher()) {            Log.v(TAG, "not running on M, skipping permission checks");            mHasCriticalPermissions = true;            return;        }        if (checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED &&                checkSelfPermission(Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED &&                checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {            mHasCriticalPermissions = true;        } else {            mHasCriticalPermissions = false;        }        Log.d(TAG,"checkPermissions mHasCriticalPermissions is "+mHasCriticalPermissions);        if ((isSupportGps && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED &&                !mSettingsManager.getBoolean(SettingsManager.SCOPE_GLOBAL, Keys.KEY_HAS_SEEN_PERMISSIONS_DIALOGS)) ||                !mHasCriticalPermissions) {// SRPD:fix for bug 502029 after location feature disabled ,it shows the location permission notify            //SPRD:fix bug501493,502701,498680,499555 problem caused by permission strategy            Intent cameraIntent = getIntent();            Bundle data = new Bundle();            data.putParcelable("cameraIntent", cameraIntent);            Intent intent = new Intent(this, PermissionsActivity.class);            /* SPRD:fix bug498680 Open camera from contact,it shows modelistview @{ */            //intent.setAction(getIntent().getAction());            intent.putExtras(data);            /* }@ */            /*SPRD:fix bug519999 Create header photo, pop permission error*/            if (!isCaptureIntent()) {                Log.d(TAG,"start PermissionsActivity from 0");                //需要设置权限，打开PermissionsAcitivity.java,关闭CameraActivity                startActivity(intent);                finish();            } else {                Log.d(TAG,"start PermissionsActivity from 1");                startActivityForResult(intent,1);            }        }    }

PermissionsActivity.java源码分析

package com.android.camera;import android.Manifest;import android.app.Activity;import android.app.Dialog;import android.app.AlertDialog;import android.app.KeyguardManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.IntentFilter;import android.content.pm.PackageManager;import android.os.Bundle;import android.provider.MediaStore;import android.view.KeyEvent;import android.view.Window;import android.view.WindowManager;import com.android.camera.app.CameraServicesImpl;import com.android.camera.debug.Log;import com.android.camera.settings.Keys;import com.android.camera.settings.SettingsManager;import com.android.camera.util.QuickActivity;import com.android.camera2.R;/** * Activity that shows permissions request dialogs and handles lack of critical permissions. */public class PermissionsActivity extends QuickActivity {    private static final Log.Tag TAG = new Log.Tag("PermissionsActivity");    private static int PERMISSION_REQUEST_CODE = 1;    private static int RESULT_CODE_OK = 1;    private static int RESULT_CODE_FAILED = 2;    private int mIndexPermissionRequestCamera;    private int mIndexPermissionRequestMicrophone;    private int mIndexPermissionRequestLocation;    private int mIndexPermissionRequestStorage;    private boolean mShouldRequestCameraPermission;    private boolean mShouldRequestMicrophonePermission;    private boolean mShouldRequestLocationPermission;    private boolean mShouldRequestStoragePermission;    private int mNumPermissionsToRequest;    private boolean mFlagHasCameraPermission;    private boolean mFlagHasMicrophonePermission;    private boolean mFlagHasStoragePermission;    private SettingsManager mSettingsManager;    private String cameraIntentAction;    /**     * Close activity when secure app passes lock screen or screen turns     * off.     */    private final BroadcastReceiver mShutdownReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {          Log.v(TAG, "received intent, finishing: " + intent.getAction());          finish();        }    };    @Override    protected void onCreateTasks(Bundle savedInstanceState) {        setContentView(R.layout.permissions);        mSettingsManager = CameraServicesImpl.instance().getSettingsManager();        // Filter for screen off so that we can finish permissions activity        // when screen is off.        IntentFilter filter_screen_off = new IntentFilter(Intent.ACTION_SCREEN_OFF);        registerReceiver(mShutdownReceiver, filter_screen_off);        // Filter for phone unlock so that we can finish permissions activity        // via this UI path:        //    1. from secure lock screen, user starts secure camera        //    2. user presses home button        //    3. user unlocks phone        IntentFilter filter_user_unlock = new IntentFilter(Intent.ACTION_USER_PRESENT);        registerReceiver(mShutdownReceiver, filter_user_unlock);        Window win = getWindow();        if (isKeyguardLocked()) {            win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);        } else {            win.clearFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);        }        //SPRD:fix bug501493,502701,498680,499555 problem caused by permission strategy        Intent cameraIntent = (Intent)getIntent().getParcelableExtra("cameraIntent");        cameraIntentAction = cameraIntent.getAction();        // SPRD Bug:508576 The dialog is created repeatly when rotating the screen.        mNumPermissionsToRequest = 0;        Log.d(TAG,"onCreateTasks start ");        checkPermissions();    }    @Override    protected void onResumeTasks() {        /*         * SPRD Bug:508576 The dialog is created repeatly when rotating the screen. @{         * Original Android code:        mNumPermissionsToRequest = 0;        checkPermissions();         */        /* @} */    }    @Override    protected void onDestroyTasks() {        Log.v(TAG, "onDestroy: unregistering receivers");        unregisterReceiver(mShutdownReceiver);    }    private void checkPermissions() {        if (checkSelfPermission(Manifest.permission.CAMERA)                != PackageManager.PERMISSION_GRANTED) {            mNumPermissionsToRequest++;            mShouldRequestCameraPermission = true;        } else {            mFlagHasCameraPermission = true;        }        if (checkSelfPermission(Manifest.permission.RECORD_AUDIO)                != PackageManager.PERMISSION_GRANTED) {            mNumPermissionsToRequest++;            mShouldRequestMicrophonePermission = true;        } else {            mFlagHasMicrophonePermission = true;        }        if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE)                != PackageManager.PERMISSION_GRANTED) {            mNumPermissionsToRequest++;            mShouldRequestStoragePermission = true;        } else {            mFlagHasStoragePermission = true;        }/* SRPD:fix for bug 502029 after location feature disabled ,it shows the location permission notify        if (checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION)                != PackageManager.PERMISSION_GRANTED) {            mNumPermissionsToRequest++;            mShouldRequestLocationPermission = true;        }*/        if (mNumPermissionsToRequest != 0) {            /* SPRD:fix bug519999 Create header photo, pop permission error             * original code             * if (!isKeyguardLocked() && !mSettingsManager.getBoolean(SettingsManager.SCOPE_GLOBAL,             *      Keys.KEY_HAS_SEEN_PERMISSIONS_DIALOGS)) {             */            if (!isKeyguardLocked()) {                buildPermissionsRequest();            } else {                // Permissions dialog has already been shown, or we're on                // lockscreen, and we're still missing permissions.                handlePermissionsFailure();            }        } else {            handlePermissionsSuccess();        }    }    private void buildPermissionsRequest() {        String[] permissionsToRequest = new String[mNumPermissionsToRequest];        int permissionsRequestIndex = 0;        if (mShouldRequestCameraPermission) {            permissionsToRequest[permissionsRequestIndex] = Manifest.permission.CAMERA;            mIndexPermissionRequestCamera = permissionsRequestIndex;            permissionsRequestIndex++;        }        if (mShouldRequestMicrophonePermission) {            permissionsToRequest[permissionsRequestIndex] = Manifest.permission.RECORD_AUDIO;            mIndexPermissionRequestMicrophone = permissionsRequestIndex;            permissionsRequestIndex++;        }        if (mShouldRequestStoragePermission) {            permissionsToRequest[permissionsRequestIndex] = Manifest.permission.READ_EXTERNAL_STORAGE;            mIndexPermissionRequestStorage = permissionsRequestIndex;            permissionsRequestIndex++;        }        if (mShouldRequestLocationPermission) {            permissionsToRequest[permissionsRequestIndex] = Manifest.permission.ACCESS_COARSE_LOCATION;            mIndexPermissionRequestLocation = permissionsRequestIndex;        }        Log.v(TAG, "requestPermissions count: " + permissionsToRequest.length);        requestPermissions(permissionsToRequest, PERMISSION_REQUEST_CODE);    }    @Override    public void onRequestPermissionsResult(int requestCode,                                           String permissions[], int[] grantResults) {        Log.v(TAG, "onPermissionsResult counts: " + permissions.length + ":" + grantResults.length);        mSettingsManager.set(                SettingsManager.SCOPE_GLOBAL,                Keys.KEY_HAS_SEEN_PERMISSIONS_DIALOGS,                true);        if (mShouldRequestCameraPermission) {            if (grantResults.length > 0 && grantResults[mIndexPermissionRequestCamera] ==                    PackageManager.PERMISSION_GRANTED) {                mFlagHasCameraPermission = true;            } else {                handlePermissionsFailure();            }        }        if (mShouldRequestMicrophonePermission) {            if (grantResults.length > 0 && grantResults[mIndexPermissionRequestMicrophone] ==                    PackageManager.PERMISSION_GRANTED) {                mFlagHasMicrophonePermission = true;            } else {                handlePermissionsFailure();            }        }        if (mShouldRequestStoragePermission) {            if (grantResults.length > 0 && grantResults[mIndexPermissionRequestStorage] ==                    PackageManager.PERMISSION_GRANTED) {                mFlagHasStoragePermission = true;            } else {                handlePermissionsFailure();            }        }        if (mShouldRequestLocationPermission) {            if (grantResults.length > 0 && grantResults[mIndexPermissionRequestLocation] ==                    PackageManager.PERMISSION_GRANTED) {                // Do nothing            } else {                // Do nothing            }        }        if (mFlagHasCameraPermission && mFlagHasMicrophonePermission && mFlagHasStoragePermission) {            handlePermissionsSuccess();        }    }    private void handlePermissionsSuccess() {        //SPRD:fix bug519999 Create header photo, pop permission error        if (!isCaptureIntent()) {            Intent intent = new Intent(this, CameraActivity.class);            startActivity(intent);        } else {            setResult(RESULT_OK);        }        finish();    }    private void handlePermissionsFailure() {        new AlertDialog.Builder(this).setTitle(getResources().getString(R.string.camera_error_title))                .setMessage(getResources().getString(R.string.error_permissions))                .setCancelable(false)                .setOnKeyListener(new Dialog.OnKeyListener() {                    @Override                    public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {                        if (keyCode == KeyEvent.KEYCODE_BACK) {                            finish();                        }                        return true;                    }                })                .setPositiveButton(getResources().getString(R.string.dialog_dismiss),                        new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        if (isCaptureIntent()) {                            setResult(RESULT_CANCELED);                        }                        finish();                    }                })                .show();    }    //SPRD:fix bug501493,502701,498680,499555 problem caused by permission strategy    private boolean isCaptureIntent() {        if (MediaStore.ACTION_VIDEO_CAPTURE.equals(cameraIntentAction)                || MediaStore.ACTION_IMAGE_CAPTURE.equals(cameraIntentAction)                || MediaStore.ACTION_IMAGE_CAPTURE_SECURE.equals(cameraIntentAction)) {            return true;        } else {            return false;        }    }}

这个activity很好理解，最后是申请权限成功工作handlePermissionsSuccess重启启动CameraActivity

    private void handlePermissionsSuccess() {        //SPRD:fix bug519999 Create header photo, pop permission error        if (!isCaptureIntent()) {            Intent intent = new Intent(this, CameraActivity.class);            startActivity(intent);        } else {            setResult(RESULT_OK);        }        finish();    }

CaptureActivity

此界面在AndroidManifest.xml中的注册信息如下：

        <activity            android:name="com.android.camera.CaptureActivity"            android:label="@string/app_name"            android:theme="@style/Theme.Camera"            android:configChanges="orientation|screenSize|keyboardHidden"            android:windowSoftInputMode="stateAlwaysHidden|adjustPan"            android:screenOrientation="portrait">            <intent-filter>                <action android:name="android.media.action.IMAGE_CAPTURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity>

android.media.action.IMAGE_CAPTURE
主要是实现第三方调用相机拍照的功能。

        Intent intent = null;        intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        intent.putExtra("return-data", false);        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());        intent.putExtra("noFaceDetection", true);        startActivityForResult(intent, RESULT_CAMERA_ONLY);

在onActivityResult中接收：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if (resultCode != Activity.RESULT_OK)        return;    switch (requestCode) {        case RESULT_CAMERA_ONLY: {            try {                Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));                mImage.setImageBitmap(bitmap);            } catch (Exception e) {                e.printStackTrace();            }        }        break;    }}

VideoCamera

        <!-- Video camera and capture use the Camcorder label and icon. -->        <activity-alias            android:name="com.android.camera.VideoCamera"            android:label="@string/video_camera_label"            android:targetActivity="com.android.camera.CaptureActivity">            <intent-filter>                <action android:name="android.media.action.VIDEO_CAMERA" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.media.action.VIDEO_CAPTURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity-alias>

和上面的相同也是提供第三方调用录像的接口。

SecureCameraActivity

        <activity            android:name="com.android.camera.SecureCameraActivity"            android:clearTaskOnLaunch="true"            android:configChanges="orientation|screenSize|keyboardHidden"            android:excludeFromRecents="true"            android:label="@string/app_name"            android:taskAffinity="com.android.camera.SecureCameraActivity"            android:theme="@style/Theme.SecureCamera"            android:windowSoftInputMode="stateAlwaysHidden|adjustPan" >            <intent-filter>                <action android:name="android.media.action.STILL_IMAGE_CAMERA_SECURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <intent-filter>                <action android:name="android.media.action.IMAGE_CAPTURE_SECURE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>            <meta-data                android:name="com.android.keyguard.layout"                android:resource="@layout/keyguard_widget" />        </activity>

在锁屏状态下，调用相机入口。

CameraSettingsActivity

有关相机设置的界面

ImageEditControlActivity 以及部分Ucamera的界面

ucamera的入口。

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