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Tôi đang viết ứng dụng rất đơn giản. Nó hoạt động OK, nhưng khi tôi nhấn một phím trở lại nó bị treo (Hoạt động đã bị rò rỉ IntentReceiver đã được đăng ký ban đầu ở đây). Ứng dụng này sẽ hoạt động ở chế độ nền. Làm thế nào để làm điều đó đúng cách?Android - Hoạt động đã bị rò rỉ IntentReceiver
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ProgressBar;
import android.widget.RadioButton;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;
public class Bateria extends Activity implements OnClickListener, OnSeekBarChangeListener {
ProgressBar pbBatteryLevel;
TextView tvBatteryLevel;
TextView tvLeft;
RadioButton rbPercent;
RadioButton rbTime;
SeekBar sbSetLeft;
boolean percent; // true - percent, false - time
boolean informed;
int progress;
int MAX_TIME;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
PowerManager pM = (PowerManager) getSystemService(Context.POWER_SERVICE);
WakeLock wL = pM.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "whatever");
long HOURS24 = 86400000;
super.onCreate(savedInstanceState);
wL.acquire(HOURS24);
setContentView(R.layout.main);
initialize();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
registerReceiver(batteryInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
}
private void initialize() {
// TODO Auto-generated method stub
SharedPreferences preferences = getSharedPreferences("SP_BATTERY", 0);
percent = preferences.getBoolean("percent", true);
progress = preferences.getInt("progress", 0);
informed = false;
MAX_TIME = 72*60;
pbBatteryLevel = (ProgressBar) findViewById(R.id.pbBatteryLevel);
tvBatteryLevel = (TextView) findViewById(R.id.tvBatteryLevel);
tvBatteryLevel.setTextSize(20);
tvLeft = (TextView) findViewById(R.id.tvLeft);
if(percent)
tvLeft.setText(String.valueOf(progress) + " %");
else{
int minutes = MAX_TIME*progress/100;
int hours = minutes/60;
minutes -= hours*60;
tvLeft.setText(String.valueOf(hours) + "h " + String.valueOf(minutes) + "min");
}
rbPercent = (RadioButton) findViewById(R.id.rbPercent);
rbPercent.setOnClickListener(this);
rbPercent.setChecked(percent);
rbTime = (RadioButton) findViewById(R.id.rbTime);
rbTime.setOnClickListener(this);
rbTime.setChecked(!percent);
sbSetLeft = (SeekBar) findViewById(R.id.sbSetPercent);
sbSetLeft.setOnSeekBarChangeListener(this);
sbSetLeft.setProgress(progress);
registerReceiver(batteryInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
}
private BroadcastReceiver batteryInfoReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context c, Intent i) {
int level = i.getIntExtra("level", 0);
int voltage = i.getIntExtra("voltage", 0);
int temperature = i.getIntExtra("temperature", 0);
pbBatteryLevel.setProgress(level);
tvBatteryLevel.setText("Battery Level: " + Integer.toString(level)
+ "%" + "\n" + voltage + " mV " + temperature + " C");
if(level < progress && !informed){
//////////
Toast.makeText(getApplicationContext(), "BATTERY", Toast.LENGTH_LONG).show();
MediaPlayer mp = MediaPlayer.create(Bateria.this, R.raw.explosion);
mp.start();
//////////
informed = true;
}
else if(level >= progress){
informed = false;
}
}
};
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case(R.id.rbPercent):
percent = true;
tvLeft.setText(String.valueOf(progress) + " %");
break;
case(R.id.rbTime):
percent = false;
int minutes = MAX_TIME*progress/100;
int hours = minutes/60;
minutes -= hours*60;
tvLeft.setText(String.valueOf(hours) + "h " + String.valueOf(minutes) + "min");
break;
}
SharedPreferences preferences = getSharedPreferences("SP_BATTERY", 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("percent", percent);
editor.commit();
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
if(percent)
tvLeft.setText(String.valueOf(progress) + " %");
else{
int minutes = MAX_TIME*progress/100;
int hours = minutes/60;
minutes -= hours*60;
tvLeft.setText(String.valueOf(hours) + "h " + String.valueOf(minutes) + "min");
}
this.progress = progress;
SharedPreferences preferences = getSharedPreferences("SP_BATTERY", 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("progress", progress);
editor.commit();
informed = false;
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
super.onCreateOptionsMenu(menu);
MenuInflater blowUp = getMenuInflater();
blowUp.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
System.exit(0);
return false;
}
}