为什么在进度对话框运行时我必须单击后退按钮两次才能到达上一个 activity？

Question

我想要当用户想要返回上一个 activity 而对话框是运行时，它应该是单击（如 youtube）。在我的情况下，在第一次返回时按下点击进度对话框停止并显示空白页，直到我的数据未加载，然后在第二次返回时按它然后转到上一个 activity ....

我不希望按两次后退键，这会让用户在使用应用程序时感到非常恼火。

有什么解决办法吗，因为我看了其他问题，但它不符合我的要求....

我将以下代码用于对话框：

    progressDialog = new ProgressDialog(NextActivity.this );
    progressDialog.setMessage("Loading....");
    progressDialog.show();
    progressDialog.setCanceledOnTouchOutside(false);
    progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
    progressDialog.setCancelable(false);

完整代码：

 @Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.nextwhatsandroid_layout);
    progressDialog = new ProgressDialog(NextActivity.this );
    progressDialog.setMessage("Loading....");
    progressDialog.show();
    progressDialog.setCanceledOnTouchOutside(false);
    progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
   // progressDialog.setCancelable(true);

    progressDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
        @Override
        public void onDismiss(DialogInterface dialog) {
            //here, dismiss your dialog and finish your activity too
            progressDialog.dismiss();
            finish();
        }
    });

    Toolbar toolbar = (Toolbar) findViewById(R.id. toolbar );
    setSupportActionBar( toolbar );

    if (getSupportActionBar() != null) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }
    Intent intent = getIntent();
    String title = intent.getStringExtra("title");
    String hello=intent.getStringExtra("hii");
    String id = intent.getStringExtra("id");
     Log.e("ashwini", String.valueOf(id));
    getSupportActionBar().setTitle(title);
    /*Create handle for the RetrofitInstance interface*/
    DescriptService service =    DescriptClientInstance.getRetrofitInstance().create(DescriptService.class);

    Call<DescriptionModel> call = service.getAllPhotos(id);

    call.enqueue(new Callback<DescriptionModel>() {
        @Override
        public void onResponse(Call<DescriptionModel> call, Response<DescriptionModel> response) {
            progressDialog.dismiss();
            DescriptList=response.body();
            generateDataList(DescriptList);
        }

        @Override
        public void onFailure(Call<DescriptionModel> call, Throwable t) {
            progressDialog.dismiss();

            Toast.makeText(getApplicationContext(), "Something went wrong...Please try later!", Toast.LENGTH_SHORT).show();
        }
    });
}
private void generateDataList(DescriptionModel photoList) {
    recyclerView = findViewById(R.id.recyclenext);
    LinearLayoutManager manager = new LinearLayoutManager(getApplicationContext());
    recyclerView.setLayoutManager(manager);
    recyclerView.setHasFixedSize(true);
    adapter = new NextAndroidAdapter(getApplicationContext(),photoList);
    recyclerView.setAdapter(adapter);
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
    if (item.getItemId() ==android.R.id.home) {
        finish();
    }
    return super.onOptionsItemSelected(item);
}
@Override
public void onBackPressed() {
    super.onBackPressed();
}

需要帮助..提前致谢...

Answer 1

你可以这样试试

    ProgressDialog progressDialog = new ProgressDialog(this);
    progressDialog.setCanceledOnTouchOutside(false);
    progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
    progressDialog.setOnKeyListener(new ProgressDialog.OnKeyListener() {
        @Override
        public boolean onKey(DialogInterface arg0, int keyCode,
                             KeyEvent event) {
            // TODO Auto-generated method stub
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                finish();
                progressDialog.dismiss();
            }
            return true;
        }

    });

Answer 2

请使用对话框创建加载程序。后退动作将被冻结，直到对话框关闭。后面的动作会很完美。

        Dialog dialog = new Dialog(context);
        AlertDialog.Builder builder = new AlertDialog.Builder(context);

        builder.setTitle(context.getResources().getString(R.string.title))
                .setIcon(R.drawable.icon)
                .setCancelable(false);

        LayoutInflater inflater = LayoutInflater.from(context);
        View dialogView = inflater.inflate(R.layout.dialog_view, null);
        builder.setView(dialogView);
        dialog = builder.create();
        dialog.show();

api 响应后。使用以下代码行关闭对话框

       dialog.dismiss();

为什么在进度对话框运行时我必须单击后退按钮两次才能到达上一个 activity？

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