从相机或者图库获取图片

从本地图库获取图片

隐式启动activity

private static final String IMAGE_TYPE = "image/*";private static final int RESULT_IMAGE = 10;    //从本地图库获取图片private void getAnotherPicFromMediaStore() {        //本地图库        /** Intent.ACTION_PICK **         * Activity Action: Pick an item from the data, returning what was selected.         * Input: {@link #getData} is URI containing a directory of data         * (vnd.android.cursor.dir/*) from which to pick an item.         * Output: The URI of the item that was picked.         */    Intent intent = new Intent(Intent.ACTION_PICK, null);        //MediaStore.Images.Media.EXTERNAL_CONTENT_URI是照片的路径    intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_TYPE);    startActivityForResult(intent, RESULT_IMAGE);    }

选完图片回调onActivityResult

@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if (resultCode != RESULT_OK) {        return;    }    Intent intent = new Intent(this, PuzzleActivity.class);    switch (requestCode) {        case RESULT_IMAGE:                //返回图片的Uri,此例中imageUri.toString = "content://media/external/images/media/38";            Uri imageUri = data.getData();                //通过contentResolver获取图片的路径//↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓            String[] filePathColumn = {MediaStore.Images.Media.DATA};            Cursor cursor = getContentResolver().query(imageUri, filePathColumn, null, null, null);//↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑            if (!cursor.moveToFirst()) {                return;            }//↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);            String imagePath = cursor.getString(columnIndex);//↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑                //别忘了释放游标            cursor.close();            File imageFile = new File(imagePath);            if (!imageFile.exists()) {                return;            }            //do Something, imageFile就是选择的图片            break;    }}

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调用系统相机拍照片

隐式启动activity

//这个路径用来存放拍摄的照片public static final String TEMP_IMAGE_PATH;//拍照的返回码public static final int RESULT_CAMERA = 20;//直接照一张图片private void getAnotherPicFromCamera() {        //路径随便填,用来存储系统相机拍摄的照片,注意外部存储的权限    TEMP_IMAGE_PATH = getApplication().getCacheDir().toString() + "/temp.png";        //把路径转化为Uri    Uri photoUri = Uri.fromFile(new File(TEMP_IMAGE_PATH));        //使用系统相机的action    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        //将Uri附加进intent传递过去    intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);    startActivityForResult(intent, RESULT_CAMERA);}

回调onActivityResult

@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if (resultCode != RESULT_OK) {        return;    }    Intent intent = new Intent(this, PuzzleActivity.class);    switch (requestCode) {        case RESULT_CAMERA:            //返回RESULT_OK,就说明TEMP_IMAGE_PATH这个成员变量表示的文件就是我们系统相机拍摄的图片            File image = new File(TEMP_IMAGE_PATH);            break;    }}

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