android 6.0动态权限的封装写法

来源：互联网发布：java red5搭建直播编辑：程序博客网时间：2024/06/01 17:02
1 :先写一个ClassL类 BaseActivity,继承 AppCompatActivity ,然后在这个类里写权限相关的方法，如下所示：public class BaseActivity extends AppCompatActivity {    /**     * 申请指定的权限.     */    public void requestPermission(int code, String... permissions) {        ActivityCompat.requestPermissions(this, permissions, code);    }    /**     * 判断是否有指定的权限     */    public boolean hasPermission(String... permissions) {        for (String permisson : permissions) {            if (ContextCompat.checkSelfPermission(this, permisson)                    != PackageManager.PERMISSION_GRANTED) {                return false;            }        }        return true;    }    @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        switch (requestCode) {            case Constan.WRITE_READ_EXTERNAL_CODE:                if (grantResults.length > 0                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                    doSDCardPermission();                }                break;         case Constan.HARDWEAR_CAMERA_CODE:              if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                 doOpenCamera();    }    break;


 }    }    //处理整个应用中SD卡业务权限    public void doSDCardPermission() {    }

//处理整个fragment关于Camera的权限的业务逻辑public void doOpenCamera() {         }



 }


2 : 写一个常量类，，用于存放权限和权限的code ，如下所示

public class Constan {   //sd卡的    public static final int WRITE_READ_EXTERNAL_CODE = 0x01;    public static final String[] WRITE_READ_EXTERNAL_PERMISSION = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,            Manifest.permission.READ_EXTERNAL_STORAGE};   //照相机的    public static final int HARDWEAR_CAMERA_CODE = 0x02;    public static final String[] HARDWEAR_CAMERA_PERMISSION = new String[]{Manifest.permission.CAMERA};


 }


3：在其他activity中的使用 ，首先其他的activity需要继承这个BaseActivity，如下所示

public class MainActivity extends BaseActivity implementsView.OnClickListener{    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main_layout);        initView();    }    private void initView() {        btn01 = (Button) findViewById(R.id.printersetting_main_btn);        btnSelect = (Button) findViewById(R.id.select_main_btn);        //这个是悬浮在屏幕上的打印按钮        printButton = (FloatingActionButton)findViewById(R.id.printBtn);        btn01.setOnClickListener(this);        btnSelect.setOnClickListener(this);        printButton.setOnClickListener(this);        mediaSize5x7 = new PrintAttributes.MediaSize("na_5x7_5x7in", "5 x 7", 5000, 7000);        PrintUtil.doNotEncryptDeviceId = true;//属于唯一设备ID  不加密    }    @Override    public void onClick(View view) {        switch (view.getId()) {            case R.id.printersetting_main_btn://设置按钮                break;            case R.id.select_main_btn://选择文件的按钮            //在这里判断权限是否存在                boolean b = hasPermission(Constan.WRITE_READ_EXTERNAL_PERMISSION);                if (!b) {                    requestPermission(Constan.WRITE_READ_EXTERNAL_CODE, Constan.WRITE_READ_EXTERNAL_PERMISSION);                } else {                    openAlbum();                }                break;            case R.id.printBtn://悬浮按钮                              break;        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        switch (requestCode) {            case CHOOSE_PHOTO:                if (resultCode == RESULT_OK) {                    if (Build.VERSION.SDK_INT >= 19) {                        userUri=handleImageOnKitKat(data);                    } else {                        userUri=handleImageBeforeKitKat(data);                    }                }                break;        }    }    //通过uri得到文件的类型，，主要用来判断的文件是图片还是PDF    private String getMimeType(Uri uri) {        Uri returnUri = uri;        return   getContentResolver().getType(returnUri);    }    //这个类的作用主要是为了展示选择的图片或者PDF 的名称和大小    private void showFileInfo(Uri uri) {        Cursor returnCursor = getContentResolver().query(uri, null, null, null, null);        int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);        int sizeIndex = returnCursor.getColumnIndex(OpenableColumns.SIZE);        returnCursor.moveToFirst();        Toast.makeText(this,                "File " + returnCursor.getString(nameIndex) + "(" + Long.toString(returnCursor.getLong(sizeIndex)) + ")",                Toast.LENGTH_LONG).show();    }    //从相册中选择照片    public static final int CHOOSE_PHOTO = 2;    private void openAlbum() {        //action_get_content是通过intent中设置的type属性来判断具体调用哪个程序的        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);        intent.setType("image/*");        startActivityForResult(intent, CHOOSE_PHOTO);    }    @TargetApi(19)    private String  handleImageOnKitKat(Intent data) {        String imagePath = null;        Uri uri = data.getData();        Log.d(TAG, "handleImageOnKitKat:获取的 uri=data.getData()  "+uri);        if (DocumentsContract.isDocumentUri(this, uri)) {            //如果是document 类型的Uri ,则通过document_id 来处理            String docId = DocumentsContract.getDocumentId(uri);            if ("com.android.providers.media.documents".equals(uri.getAuthority())) {                String id = docId.split(":")[1];//解析出数据格式的ID                String selection = MediaStore.Images.Media._ID + "=" + id;                imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection);                Log.d(TAG, "com.android.providers.media.documents: ");            } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));                imagePath = getImagePath(contentUri, null);                Log.d(TAG, "com.android.providers.downloads.documents: ");            }        } else if ("content".equalsIgnoreCase(uri.getScheme())) {            //如果是普通类型的Uri,则使用普通的方式来处理            imagePath = getImagePath(uri, null);//            imagePath = getRealPathFromURI(uri);            Log.d(TAG, "content: ");        } else if ("file".equalsIgnoreCase(uri.getScheme())) {            //如果是file类型的uri，直接获取图片路径就可以了            imagePath = uri.getPath();            Log.d(TAG, "file ");        }        Log.d(TAG, "handleImageOnKitKat:1 图片真实路径imagePath " + imagePath);        return imagePath;    }    //android 4.4一下就直接调用这个方法就可以了    private String handleImageBeforeKitKat(Intent data) {        Uri uri = data.getData();        String imagePath = getImagePath(uri, null);        Log.d(TAG, "handleImageBeforeKitKat:2 图片真实路径imagePath " + imagePath);        return imagePath;    }    //根据uri获取路径    private String getImagePath(Uri uri, String selection) {        String path = null;        //通过Uri 和selection来获取真实的图片路径        Cursor cursor = getContentResolver().query(uri, null, selection, null, null);        if (cursor != null) {            if (cursor.moveToFirst()) {                path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));            }            cursor.close();        }        return path;    }    private String getRealPathFromURI( Uri contentUri) {        Cursor cursor = null;        try {            String[] proj = { MediaStore.Images.Media.DATA };            cursor = getContentResolver().query(contentUri,  proj, null, null, null);            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);            cursor.moveToFirst();            String path = cursor.getString(column_index);            return path;        } finally {            if (cursor != null) {                cursor.close();            }        }    }    //重新写这个方法    @Override    public void doSDCardPermission() {        super.doSDCardPermission();          openAlbum();    }}
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