android - 使用 Intent 打开相机

Question

我想在 Android 中使用 intent 打开 camera 。

我使用了以下代码，但是当我按下按钮(其操作是onclick() 函数时，应用程序自行关闭。

 public void onclick(int actionCode){
     Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
     startActivityForResult(takePictureIntent, actionCode);
} 
public static boolean isIntentAvailable(Context context, String action) { 
    final PackageManager packageManager = context.getPackageManager(); 
    final Intent intent = new Intent(action); 
    List<ResolveInfo> list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY); 
    return list.size() > 0;
}

如果有人可以帮助我。

Answer 1

File destination;
Uri selectedImage;
public static String selectedPath1 = "NONE";
private static final int PICK_Camera_IMAGE = 2;
private static final int SELECT_FILE1 = 1;
public static Bitmap bmpScale;
public static String imagePath;



    mcamera = (Button) findViewById(R.id.button1);
    mcamera.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            String name = dateToString(new Date(), "yyyy-MM-dd-hh-mm-ss");
            destination = new File(Environment
                    .getExternalStorageDirectory(), name + ".jpg");

            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT,
                    Uri.fromFile(destination));
            startActivityForResult(intent, PICK_Camera_IMAGE);

        }
    });

    // ......................gallery_function..........//
    mgallery = (Button) findViewById(R.id.button2);
    mgallery.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            openGallery(SELECT_FILE1);
        }
    });

为了 Intent //...............................图库功能................................//

    public void openGallery(int SELECT_FILE1) {

    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(
            Intent.createChooser(intent, "Select file to upload "),
            SELECT_FILE1);

}

//……...... Intent …………

                // ..................
protected void onActivityResult(int requestCode, int resultCode,
        Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
    Uri selectedImageUri = null;
    String filePath = null;
    switch (requestCode) {
    case SELECT_FILE1:
        if (resultCode == Activity.RESULT_OK) {
            selectedImage = imageReturnedIntent.getData();

            if (requestCode == SELECT_FILE1) {
                selectedPath1 = getPath(selectedImage);
                // mimagepath.setText(selectedPath1);
                // Toast.makeText(Camera.this, "" + selectedPath1 + "",
                // 500).show();

                if (selectedPath1 != null) {

                    BitmapFactory.Options options = new BitmapFactory.Options();

                    options.inJustDecodeBounds = true;
                    // image path `String` where your image is located
                    BitmapFactory.decodeFile(selectedPath1, options);



                // Log.d("setpath ", "setpath " + selectedPath1);
                ;

            }
        }

        break;
    case PICK_Camera_IMAGE:
        if (resultCode == RESULT_OK) {

            try {
                in = new FileInputStream(destination);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inSampleSize = 4;
            imagePath = destination.getAbsolutePath();

            // Toast.makeText(Camera.this, "" + imagePath +
            // "",Toast.LENGTH_LONG).show();

        break;

    }

}