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Progress Dialog Example
If you want to show any progress on the screen then progress dialog is very useful for showing such stuffs.
A progress dialog is useful for showing the progress of some activities, such as the status of transferring files from one location to another or the status of downloadoperation.
Here is an example of progress dialog, we are going to use the similar project that we have created in the previous section. We need to make some changes in the MainActivity.java file -
package com.example.Dialog;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
public class MainActivity extends Activity {
CharSequence[] items = { “Google”, “Apple”, “Microsoft” };
boolean[] itemsChecked = new boolean [items.length];
private ProgressDialog _progressDialog;
private int _progress = 0;
private Handler _progressHandler;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn = (Button) findViewById(R.id.btn_dialog);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(1);
_progress = 0;
_progressDialog.setProgress(0);
_progressHandler.sendEmptyMessage(0);
}
});
_progressHandler = new Handler() {
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (_progress >= 100) {
_progressDialog.dismiss();
} else {
_progress++;
_progressDialog.incrementProgressBy(1);
_progressHandler.sendEmptyMessageDelayed(0, 100);
}
}
};
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case 0:
return new AlertDialog.Builder(this)
//...
//...
.create();
case 1:
_progressDialog = new ProgressDialog(this);
_progressDialog.setIcon(R.drawable.icon);
_progressDialog.setTitle(“Downloading files...”);
_progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
_progressDialog.setButton(DialogInterface.BUTTON_POSITIVE, “Hide”, new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton)
{
Toast.makeText(getBaseContext(),
“Hide clicked!”, Toast.LENGTH_SHORT).show();
}
});
_progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, “Cancel”, new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton)
{
Toast.makeText(getBaseContext(),
“Cancel clicked!”, Toast.LENGTH_SHORT).show();
}
});
return _progressDialog;
}
return null;
}
}
Now run the application and you’ll see the result in an emulator.
You’ll obtain output like -
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