Question

我写了一个函数来扫描音频文件的所有目录/文件，如果找到任何音频文件，它会被添加到媒体商店。因此，在扫描时我将目录/文件的路径设置为textview。单击按钮时会发生这一切。现在，问题是当我单击该按钮时，应用程序冻结了一段时间然后崩溃（尽管目录和文件的路径是在logcat中打印的）。我认为这是因为它是一个繁重的任务，它在主线程上运行。所以我尝试了：

1）创建一个新线程 2）在N秒后延迟处理程序并调用函数 3）使用AsyncTask

以上所有内容都导致了errora崩溃：

1）Reason: Input dispatching timed out (Waiting to send non-key event because the touched window has not finished processing certain input events that were delivered to it over 500.0ms ago. Wait queue length: 2. Wait queue head age: 12727.2ms.)

2）。 android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@e22c464 is not valid; is your activity running?

代码：

 public void rescanForMedia(View view) {



    AlertDialog.Builder rescanInit = new AlertDialog.Builder(this);
    LayoutInflater layoutInflator = LayoutInflater.from(this);
    View v = layoutInflator.inflate(R.layout.dialog_mediascanner, null);
    rescanInit.setView(v);

    Button  mediaScanButton = v.findViewById(R.id.mediaScanButton);

    mediaScaninitBox = rescanInit.create();
    mediaScaninitBox.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
    mediaScaninitBox.show();

    mediaScanButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Toast.makeText(SettingsActivity.this, "Scan Started", Toast.LENGTH_SHORT).show();

            AlertDialog.Builder rescanRunningBox = new AlertDialog.Builder(SettingsActivity.this);
            LayoutInflater layoutInflator = LayoutInflater.from(SettingsActivity.this);
            View v = layoutInflator.inflate(R.layout.dialog_scanning, null);
            rescanRunningBox.setView(v);
            mediaScanRunningBox = rescanRunningBox.create();
            mediaScanRunningBox.show();
            scannedFiles = v.findViewById(R.id.scannedFiles);
            mediaScaninitBox.dismiss();
            walkDir(Environment.getExternalStorageDirectory());


        }
    });



}

public void walkDir(File file){

    File[] files = file.listFiles();
    if (files != null) {
        for (final File filess : files) {
            // checking the File is file or directory

         //    scannedFiles.setText(path);



            if (filess.isFile()) {
                path = filess.getAbsolutePath();

                        scannedFiles.setText(path);

                //   Log.v("Files: ",path);

                MediaScannerConnection.scanFile(getApplicationContext(),
                        new String[]{path},
                        new String[]{"audio/*"},
                        new MediaScannerConnection.OnScanCompletedListener() {
                            public void onScanCompleted(String path, Uri uri) {

                                mediaScanRunningBox.dismiss();

                            }
                        });

            }
            else{
                //if it is a directory

                walkDir(filess);





            }

使用递归函数时，应用程序崩溃

0 个答案: