android之给其他应用提供拍照信息

本文只是记录一些零碎的东西

只是一个简单的模拟
给其他应用提供数据
做一个拍照功能,系统可以调用我的拍照,返回数据给调用者
google : https://developer.android.com/training/basics/intents/filters.html
文章介绍的很详细，但是我并没有找到我想要的
其实文章也还是很有用的,最起码告诉你 需要 setResult(RESULT_OK);

看看实现的效果图 ，可以设置默认拍照应用

git 仓库 https://github.com/CL-window/cameraForResult

   

怎么把拍照数据返回回去，没错 通过启动我们应用的Intent
Uri saveUri = getIntent().getExtras().getParcelable(MediaStore.EXTRA_OUTPUT);

OutputStream outputStream = null;
try {
outputStream = getContentResolver().openOutputStream(saveUri);
if (outputStream != null ) {
photo.compress(Bitmap.CompressFormat.JPEG,100,outputStream);// write your bitmap here
setResult(RESULT_OK);
}
} catch (IOException e) {
e.printStackTrace();
}

怎么指定我们的应用程序拍照
app/src/main/AndroidManifest.xml
<intent-filter>
<action android:name="android.media.action.IMAGE_CAPTURE"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>

记录一个很奇怪的问题
设置app为默认拍照软件后,CapturePictureActivity 一直循环在新建，导致崩溃
只是新建，没有destroy,但是取消这个设置后就没有问题
问题原因没有找到 感觉猜测是 startActivityForResult 的缘故,因为启动的这个界面是startActivityForResult启动的
然后这个界面又 startActivityForResult 一个新的界面，只是猜测
附上一段日志，简直要疯了的节奏
01-20 16:35:34.930 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@9de6483
01-20 16:35:34.930 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:34.955 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@3bb28e2
01-20 16:35:34.955 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:34.978 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@f00ec1d
01-20 16:35:34.978 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.000 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@9afb24
01-20 16:35:35.000 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.022 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@4470ca7
01-20 16:35:35.022 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.049 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@a98016
01-20 16:35:35.049 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.072 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@1cbf8a1
01-20 16:35:35.072 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.093 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@f314438
01-20 16:35:35.093 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.115 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@b4b3e8b
01-20 16:35:35.115 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.138 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@2e0200a
01-20 16:35:35.138 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.163 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@1a868e5
01-20 16:35:35.163 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.183 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@4f1580c
01-20 16:35:35.183 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...
01-20 16:35:35.204 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: onCreate...com.cl.slack.cameraforresult.CapturePictureActivity@ed59e2f
01-20 16:35:35.204 19392-19392/com.cl.slack.cameraforresult I/CapturePictureActivity: openSystemCamera...

换成自己的拍照实现方式

代码的基础 android-Camera2Basic

没有几行代码

import android.Manifest;import android.content.Intent;import android.content.pm.PackageManager;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Build;import android.os.Bundle;import android.os.Handler;import android.os.Looper;import android.os.Message;import android.provider.MediaStore;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v7.app.AppCompatActivity;import android.util.Log;import java.io.IOException;import java.io.OutputStream;import java.util.Arrays;public class CapturePictureActivity extends AppCompatActivity {    private static final String TAG = "CapturePictureActivity";    private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 0x100;    private static final int CHECK_PERMISSION_REQUEST_CODE = 0x101;    private Uri saveUri;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        Log.i(TAG, "onCreate..." + this.toString());        setContentView(R.layout.activity_camera_capture);        initSaveUri();        checkPermission(Manifest.permission.CAMERA);        // 自定义拍照 使用的google demo        getFragmentManager().beginTransaction()                .replace(R.id.container, Camera2BasicFragment.newInstance().setBitmapListener(listener))                .commit();    }    /**     * this is only one param     *     * @param permissions     */    private void checkPermission(String... permissions) {        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {            openSystemCamera();            return;        }        if (ActivityCompat.checkSelfPermission(this, permissions[0]) == PackageManager.PERMISSION_GRANTED) {            openSystemCamera();        } else {            ActivityCompat.requestPermissions(this,                    Arrays.copyOf(permissions, 1), CHECK_PERMISSION_REQUEST_CODE);        }    }    private void initSaveUri() {        Intent intent = getIntent();        if (intent != null) {            Bundle b = intent.getExtras();            if (b != null) {                saveUri = b.getParcelable(MediaStore.EXTRA_OUTPUT);            } else {                saveUri = null;            }        } else {            saveUri = null;        }    }    /**     * 简单的演示，就直接利用系统自带的相机应用:拍照     */    private void openSystemCamera() {        Log.i(TAG, "openSystemCamera...");        // 调用系统拍照//        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//        startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);        // 测试直接返回一张图片//        testBitmap();    }    Camera2BasicFragment.OnPhotoListener listener = new Camera2BasicFragment.OnPhotoListener() {        @Override        public void onBitmap(Bitmap bitmap) {            returnBackBitmap(bitmap);        }        @Override        public void onByte(byte[] bytes) {            returnBackBitmap(bytes);        }    };    private void testBitmap(){        Bitmap bitmap = null;        try {            bitmap = BitmapFactory.decodeStream(getAssets().open("testImg.png"));        } catch (IOException e) {            e.printStackTrace();        }        returnBackBitmap(bitmap);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {            if (data == null) {                finish();                return;            }            Bitmap photo = data.getParcelableExtra("data");            if (photo == null) {                finish();                return;            }            returnBackBitmap(photo);        }    }    private void returnBackBitmap(Bitmap photo) {        if (saveUri != null) {            // Save the bitmap to the specified URI (use a try/catch block)            OutputStream outputStream = null;            try {                outputStream = getContentResolver().openOutputStream(saveUri);                if (outputStream != null) {                    photo.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);// write your bitmap here//                        setResult(RESULT_OK);                }            } catch (IOException e) {                e.printStackTrace();            } finally {                photo.recycle();                if (outputStream != null) {                    try {                        outputStream.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                }                finish();            }        } else {            finish();        }    }    private void returnBackBitmap(byte[] bytes) {        if (saveUri != null) {            // Save the bitmap to the specified URI (use a try/catch block)            OutputStream outputStream = null;            try {                outputStream = getContentResolver().openOutputStream(saveUri);                if (outputStream != null) {                    outputStream.write(bytes);// write your bitmap here                }            } catch (IOException e) {                e.printStackTrace();            } finally {                if (outputStream != null) {                    try {                        outputStream.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                }                finish();            }        } else {            finish();        }    }    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        if (requestCode == CHECK_PERMISSION_REQUEST_CODE) {            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                openSystemCamera();            }        }    }    @Override    public void finish() {        Log.i(TAG, "finish...");        setResult(RESULT_OK);        super.finish();    }}