我有两个活动，我在第一个活动中有2个arraylist，并且我在第二个活动中存储了另一个arraylist的数组列表。当我删除第二个活动的arraylist的元素时，我想从第一个活动的相同索引elememt arraylist也将被删除。我已尝试用户给出的以下答案，我正面临另一个问题。
更新了问题： 当我删除视频时，它应该只从数组中删除该视频的缩略图，但是从数组中删除所有缩略图。
活动代码A
private HandlerThread mBackgroundHandlerThread;
private Handler mBackgroundHandler;
private String mCameraId;
private Size mPreviewSize;
private Size mVideoSize;
private MediaRecorder mMediaRecorder;
private Chronometer mChronometer;
private ImageView thumb;
//private String V1, V2, V3, V4, V5;
// private Map<String, String> mapA = new HashMap<>();
// private ImageView[] IMGS = {mImageView1, mImageView2, mImageView3, mImageView4, mImageView5};
private int mTotalRotation;
private CaptureRequest.Builder mCaptureRequestBuilder;
public static int count;
public static int max = 5;
private ImageButton mRecordImageButton;
private boolean mIsRecording = false;
public static File mVideoFolder;
private static File mRawVideoFolder;
public static String mVideoFileName;
//Test
private List<Bitmap> bitMapsAvailable = new ArrayList<>();
private List<String> bitMapsFilePath = new ArrayList<>();
private int bitMapIndex;
CameraCaptureSession storedSession;
private ArrayAdapter bitMapAdapter;
private ArrayAdapter bitMapFileAdapter;
private static SparseIntArray ORIENTATIONS = new SparseIntArray();
public int index;
static {
ORIENTATIONS.append(Surface.ROTATION_0, 0);
ORIENTATIONS.append(Surface.ROTATION_90, 90);
ORIENTATIONS.append(Surface.ROTATION_180, 180);
ORIENTATIONS.append(Surface.ROTATION_270, 270);
}
private static class CompareSizeByArea implements Comparator<Size> {
@Override
public int compare(Size lhs, Size rhs) {
return Long.signum((long) lhs.getWidth() * lhs.getHeight() / (long) rhs.getWidth() * rhs.getHeight());
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
createVideoFolder();
mMediaRecorder = new MediaRecorder();
mChronometer = (Chronometer) findViewById(R.id.chronometer);
mTextureView = (TextureView) findViewById(R.id.textureView);
mRecordImageButton = (ImageButton) findViewById(R.id.videoButton);
mRecordImageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mIsRecording) {
mChronometer.stop();
mChronometer.setVisibility(View.INVISIBLE);
mIsRecording = false;
mRecordImageButton.setImageResource(R.mipmap.start_recording);
//Toast.makeText(getApplicationContext(),"Started",Toast.LENGTH_SHORT).show();
if(storedSession != null){
try {
storedSession.stopRepeating();
storedSession.abortCaptures();
}catch (CameraAccessException e){
throw new RuntimeException(e.getMessage());
}
}
mMediaRecorder.stop();
mMediaRecorder.reset();
startPreview();
//Create bitmap with current video file path
Bitmap bitMap = ThumbnailUtils.createVideoThumbnail(mVideoFileName, MediaStore.Video.Thumbnails.MICRO_KIND);
//Add bitmap to array list
bitMapsAvailable.add(bitMap);
bitMapsFilePath.add(mVideoFileName);
// Shows thumbnails
showThumbnails();
} else {
checkWriteStoragePermission();
}
}
});
}
private void showThumbnails() {
LinearLayout layout = (LinearLayout) findViewById(R.id.thumbnails);
bitMapAdapter = new ArrayAdapter(this, R.layout.activity_main, bitMapsAvailable);
bitMapFileAdapter = new ArrayAdapter(this, R.layout.activity_main, bitMapsFilePath);
bitMapIndex = 0;
if (layout.getChildCount() > 0) {
layout.removeAllViews();
}
for (Bitmap eachBitMap : bitMapsAvailable) {
bitMapIndex++;
ImageView thumb = new ImageView(this);
thumb.setId(new Integer(bitMapIndex+ 17));
thumb.setLayoutParams(new android.view.ViewGroup.LayoutParams(100, 80));
thumb.setImageBitmap(eachBitMap);
// Adds the view to the layout
thumb.setOnClickListener(previewThumb(thumb));
layout.addView(thumb);
}
}
View.OnClickListener previewThumb(final ImageView imageview) {
return new View.OnClickListener() {
public void onClick(View arg0) {
index = imageview.getId()-18;
imageview.setBackgroundColor(0xff999999);
// Start NewActivity.class
Intent myIntent = new Intent(MainActivity.this,
VideoViewActivity.class);
// VideoView mVideoView = (VideoView) findViewById(R.id.VideoView);
Bundle bundle = new Bundle();
bundle.putStringArrayList("bitMapsAvailable", new ArrayList(bitMapsAvailable));
bundle.putStringArrayList("bitMapsFilePath", new ArrayList(bitMapsFilePath));
//Add your data to bundle
bundle.putInt("urlIndex", index);
myIntent.putExtras(bundle);
bitMapAdapter.notifyDataSetChanged();
bitMapFileAdapter.notifyDataSetChanged();
// startActivity(myIntent);
startActivityForResult(myIntent, 111);
}
};
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == 111) {
int indexToBeDeleted = data.getIntExtra("indexToDeleted", -1);
bitMapsFilePath.remove(indexToBeDeleted);
bitMapsAvailable.remove(indexToBeDeleted);
}
}
活动代码B
public VideoView videoview;
ImageButton imgButton;
ImageButton saveButton;
List<String> bitMapsAvailable = new ArrayList<>();
List<String> bitMapsFilePath = new ArrayList<>();
int indexClicked;
String videoURL;
//String videoURL = getIntent().getExtras().getString("url");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.videoview_main);
videoview = (VideoView) findViewById(R.id.VideoView);
//Toast.makeText(this, videoURL, Toast.LENGTH_SHORT).show();
Bundle bundle = getIntent().getExtras();
bitMapsAvailable = bundle.getStringArrayList("bitMapsAvailable");
bitMapsFilePath = bundle.getStringArrayList("bitMapsFilePath");
indexClicked = bundle.getInt("urlIndex");
videoURL = bitMapsFilePath.get(indexClicked);
try {
// Start the MediaController
MediaController mediacontroller = new MediaController(
VideoViewActivity.this);
mediacontroller.setAnchorView(videoview);
// Get the URL from String VideoURL
Uri video = Uri.parse(videoURL);
videoview.setMediaController(mediacontroller);
videoview.setVideoURI(video);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
videoview.requestFocus();
videoview.setOnPreparedListener(new OnPreparedListener() {
// Close the progress bar and play the video
public void onPrepared(MediaPlayer mp) {
videoview.start();
}
});
imgButton = (ImageButton) findViewById(R.id.deleteVideo);
imgButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (deleteVideoFile(indexClicked)) {
AlertDialog.Builder deletebuilder = new AlertDialog.Builder(VideoViewActivity.this);// use you activity name
deletebuilder.setMessage("Are you sure you want to delete? ");
deletebuilder.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface deletedialog, int delwhich) {
bitMapsFilePath.remove(indexClicked);
bitMapsAvailable.remove(indexClicked);
Toast.makeText(VideoViewActivity.this, "Selected video file is deleted successfully.", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(VideoViewActivity.this,MainActivity.class);
intent.putExtra("indexToBeDeleted", indexClicked);
// intent.getIntExtra()
setResult(RESULT_OK, intent);
startActivity(intent);
finish();
}
});
deletebuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface deletedialog, int delwhich) {
// Toast.makeText(VideoViewActivity.this, "Abort by user", Toast.LENGTH_SHORT).show();
}
});
AlertDialog deletedialog = deletebuilder.create();
deletedialog.show();
} else {
Toast.makeText(VideoViewActivity.this, "Not deleted", Toast.LENGTH_SHORT).show();
}
}
});
saveButton = (ImageButton) findViewById(R.id.saveVideo);
saveButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// final int index = checkBox.getId()-31;
AlertDialog.Builder builderSave = new AlertDialog.Builder(VideoViewActivity.this);// use you activity name
builderSave.setMessage("Save the selected file and delete the rest?")
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogSave, int whichSave) {
String src = bitMapsFilePath.get(indexClicked);
String destination = mVideoFolder + "/" + new File(src).getName();
File srcFile = new File(src);
srcFile.renameTo(new File(destination));
Toast.makeText(VideoViewActivity.this, "Saved in " + destination, Toast.LENGTH_SHORT).show();
bitMapsAvailable.clear();
for (String filePath : bitMapsFilePath) {
File file = new File(filePath);
file.delete();
}
bitMapsFilePath.clear();
Toast.makeText(VideoViewActivity.this, "Temporary videos are deleted successfully", Toast.LENGTH_SHORT).show();
finish();
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogSave, int whichSave) {
Toast.makeText(VideoViewActivity.this, "Not deleted", Toast.LENGTH_SHORT).show();
}
});
AlertDialog dialogSave = builderSave.create();
dialogSave.show();
//Toast.makeText(VideoViewActivity.this, "Not deleted", Toast.LENGTH_SHORT).show();
}
});
}
private boolean deleteVideoFile(final int index) {
try {
File file = new File(videoURL);
return file.delete();
} catch (Exception e) {
Toast.makeText(VideoViewActivity.this, "Not deleted", Toast.LENGTH_SHORT).show();
Log.e("Error", e.getMessage());
throw new RuntimeException(e.getMessage());
}
}
答案 0 :(得分：1)
尝试以下解决方案！
活动A：
View.OnClickListener previewThumb ( final ImageView imageview){
return new View.OnClickListener() {
public void onClick(View arg0) {
int index = imageview.getId() - 18;
imageview.setBackgroundColor(0xff999999);
// Start NewActivity.class
Intent myIntent = new Intent(MainActivity.this,
VideoViewActivity.class);
Bundle bundle = new Bundle();
bundle.putStringArrayList("bitMapsAvailable", new ArrayList(bitMapsAvailable));
bundle.putStringArrayList("bitMapsFilePath", new ArrayList(bitMapsFilePath));
//Add your data to bundle
bundle.putInt("urlIndex", index);
myIntent.putExtras(bundle);
bitMapAdapter.notifyDataSetChanged();
bitMapFileAdapter.notifyDataSetChanged();
//Change this line
startActivityForResult(myIntent, 111);
}
};
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == 111) {
int indexToBeDeleted = data.getIntExtra("indexToBeDeleted");
bitMapsFilePath.remove(indexToBeDeleted);
bitMapsAvailable.remove(indexToBeDeleted);
}
}
}
活动B：
imgButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (deleteVideoFile(indexClicked)) {
AlertDialog.Builder deletebuilder = new AlertDialog.Builder(VideoViewActivity.this);// use you activity name
deletebuilder.setMessage("Are you sure you want to delete? ")
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface deletedialog, int delwhich) {
bitMapsFilePath.remove(indexClicked);
bitMapsAvailable.remove(indexClicked);
Toast.makeText(VideoViewActivity.this, "Selected video file is deleted successfully.", Toast.LENGTH_SHORT).show();
//Change here too-----------
Intent intent = new Intent();
intent.putExtra("indexToBeDeleted",indexClicked);
setResult(RESULT_OK,intent);
finish();
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface deletedialog, int delwhich) {
// Toast.makeText(VideoViewActivity.this, "Abort by user", Toast.LENGTH_SHORT).show();
}
});
AlertDialog deletedialog = deletebuilder.create();
deletedialog.show();
} else {
Toast.makeText(VideoViewActivity.this, "Not deleted", Toast.LENGTH_SHORT).show();
}
}
});
希望这对你有用!!