Dr.Easy Dr.Easy - 1 month ago 9
Android Question

How I can execute asynctask several times with selectable times?

I have on mainactivty 7 radio buttons each button want to be different time (1min , 5 min , 10 min ,.....) and I have asynctask there i'm calling pictures from server (php) so I want when the user selects the first radio button (1 min) the the asynctask execute every 1 min i tried radiobutton.ischecked and puttet handler it didn't worked out
my server working and I'm receiving response but I cant execute the asynctask with this settings to setwallpaper it took a look a my code

TextView txt;
Button btn;
ImageView imageView;
String forecastJsonStr;
RadioButton rd1,rd2,rd3,rd4,rd5,rd6,rd7;
Runnable mHandlerTask;
Handler mHandler;
RadioGroup radioGroup;

private final static int INTERVAL = 4000 ; //1 min
private final static int INTERVAL2 = 1000 * 60 * 5; // 5 min
private final static int INTERVAL3 = 1000 * 60 * 10; // 10 min
private final static int INTERVAL4 = 1000 * 60 * 15; // 15 min
private final static int INTERVAL5 = 1000 * 60 * 30 ; // 30 min
private final static int INTERVAL6 = 1000 * 60 * 60; // 1 hour
private final static int INTERVAL7 = 1000 * 60 * 1440; // 1 day

private final String hostName = "http://555.555.555.555";
private final String hostRequestName = "/yay.php";
private final String hostWallpaperName = "/wallpaper/";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt = (TextView) findViewById(R.id.textView);
imageView = (ImageView) findViewById(R.id.imageView);
rd1 = (RadioButton)findViewById(R.id.radioButton) ;
rd2 = (RadioButton)findViewById(R.id.radioButton2) ;
rd3 = (RadioButton)findViewById(R.id.radioButton3) ;
rd4 = (RadioButton)findViewById(R.id.radioButton4) ;
rd5 = (RadioButton)findViewById(R.id.radioButton5) ;
rd6 = (RadioButton)findViewById(R.id.radioButton6) ;
rd7 = (RadioButton)findViewById(R.id.radioButton7) ;
radioGroup = (RadioGroup)findViewById(R.id.radiogroup) ;
mHandler = new Handler();
btn = (Button) findViewById(R.id.button);

btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(rd1.isChecked()) {
mHandlerTask = new Runnable() {
@Override
public void run() {
new WallpaperData().execute();
mHandler.postDelayed(mHandlerTask, INTERVAL);
startRepeatingTask();
}
};


}
}
void startRepeatingTask()
{
mHandlerTask.run();
}

});
}


private class WallpaperData extends AsyncTask<Void, Void, String> {

@Override
protected String doInBackground(Void... params) {

HttpURLConnection urlConnection = null;
BufferedReader reader = null;


try {

URL url = new URL("http://555.555.555.555/yay.php");

urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.connect();
DataOutputStream wr = new DataOutputStream(
urlConnection.getOutputStream());
wr.write("method=get_random_wallpaper".getBytes());
wr.flush();
wr.close();

InputStream inputStream = urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));

String line;
while ((line = reader.readLine()) != null) {

buffer.append(line + "\n");
Log.d("hey", buffer.toString());

}

if (buffer.length() == 0) {
return null;
}
forecastJsonStr = buffer.toString();

return forecastJsonStr;
} catch (IOException e) {
Log.e("PlaceholderFragment", "Error ", e);

return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
e.printStackTrace();
}
}
}
}

@Override
protected void onPostExecute(final String forecastJsonStr) {

txt.setText(forecastJsonStr);

Thread thread = new Thread(new Runnable() {

@Override
public void run() {

WallpaperManager wallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
Bitmap result = Picasso.with(getBaseContext())
.load(hostName + hostWallpaperName + forecastJsonStr)
.get();
wallpaperManager.setBitmap(result);
} catch (IOException ex) {
ex.printStackTrace();
}

}
});
thread.start();

super.onPostExecute(forecastJsonStr);


}

}
}

Answer

Create a variable to store the select interval. Move the mHandlerTask and startRepeatingTask method outside onCreate. Inside the onClick call startRepeatingTask method.

See the code below,

private final static int SELECTED_INTERVAL = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(rd1.isChecked()) {
                SELECTED_INTERVAL = INTERVAL;
            } else if (rd2.isChecked()) {
                SELECTED_INTERVAL = INTERVAL2;
            }
            startRepeatingTask();
        }
    });
}

void startRepeatingTask() {
    mHandlerTask.run();
}

Runnable mHandlerTask = new Runnable() {
    @Override
    public void run() {
        new WallpaperData().execute();
        mHandler.postDelayed(mHandlerTask, SELECTED_INTERVAL);
    }
};
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