I saw a question “loading…” above the technical q&A. The last three points are dynamic, so an effect is implemented. I think about it, but I can’t think of a good way to deal with it.

Tried it and did it in the stupidest way possible. Let’s take a look at the results:



This is done by customizing a Dialog. The loading effect is implemented inside the Dialog, and the progress is controlled from within the Activity.

Here is the Dialog implementation class:

public class CustomDialog extends AlertDialog { public CustomDialog(Context context) { super(context); } private TextView tv_loading; private ProgressBar progressBar; private Timer timer; private int count = 1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.dialog_progress); tv_loading = (TextView) findViewById(R.id.tv_loading); progressBar = (ProgressBar) findViewById(R.id.pb); Display d = getWindow().getWindowManager().getDefaultDisplay(); WindowManager.LayoutParams lp = getWindow().getAttributes(); Lp.width = (int) (d.getwidth () * 0.8); getWindow().setAttributes(lp); timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { handler.sendEmptyMessage(0); }}, 300, 300); setOnDismissListener(new OnDismissListener() { @Override public void onDismiss(DialogInterface dialog) { if (timer ! = null) { timer.cancel(); }}}); } Handler handler = new Handler() { @Override public void handleMessage(Message msg) { count++; if (count > 3) { count = 1; } switch (count) {case 1: tv_load.settext (" loading. "); break; Case 2: tv_load.settext (" loading... ") ); break; Case 3: tv_loading.setText(" loading...") ); break; }}}; public void setProgress(int progress) { progressBar.setProgress(progress); if (progress == 100) { this.dismiss(); }}}Copy the code

The layout files are a TextView, a ProgressBar, and dialog_progress.xml




    

    



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Because I didn’t think of any other ideas, I could only change the display of TextView through Timer. The ProgressBar (ProgressBar) is a custom horizontal ProgressBar on Android that has rounded corners. Dialog is like this. The next call is mainActivity.class

public class MainActivity extends FragmentActivity { private CustomDialog customDialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); customDialog = new CustomDialog(this); } private int count = 0; public void tvClick(View view) { customDialog.show(); final Timer timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { count += 10; runOnUiThread(new Runnable() { @Override public void run() { if (customDialog ! = null && customDialog.isShowing()) { customDialog.setProgress(count); }}}); if (count >= 100) { timer.cancel(); }}}, 0, 500); customDialog.setOnDismissListener(new DialogInterface.OnDismissListener() { @Override public void onDismiss(DialogInterface dialog) { if (timer ! = null) timer.cancel(); count = 0; }}); }}Copy the code

Here, the Timer is also used to simulate the loading progress. (In the process of writing, I feel that the Timer operation is much more convenient than the other two methods.) Click events I call directly in XML.

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In addition, this type of click event writing is not available in fragments and can only be triggered by setOnClickListener.

Code is not much, as a casual note.

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