Android异常android.app.IntentReceiverLeaked

Question

我正在使用 BroadcastReceiver 来监控电池电量。我提到了this我的代码是

public class PowerConnectionReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) { 
    int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
    boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
                        status == BatteryManager.BATTERY_STATUS_FULL;

    int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
    boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
    boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
}

}

并将其添加到我的 list 中

  <receiver android:name=".PowerConnectionReceiver">
  <intent-filter>
    <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
    <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
  </intent-filter>
</receiver>

它可以工作，但在 onReceive 中，intent 没有任何值(value)。当我尝试在 onReceive 中启动 Activity 时，应用程序停止并返回以下错误。

android.app.IntentReceiverLeaked: Activity com.example.batterycharging.Activity.MainActivity has leaked IntentReceiver com.example.batterycharging.Activity.MainActivity$1@b7548490 that was originally registered here. Are you missing a call to unregisterReceiver()?
        at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:756)
        at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:551)
        at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:800)
        at android.app.ContextImpl.registerReceiver(ContextImpl.java:787)
        at android.app.ContextImpl.registerReceiver(ContextImpl.java:781)
        at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:318)
        at com.example.suresh.batterycharging.Activity.MainActivity.onCreate(MainActivity.java:40)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
        at android.app.ActivityThread.access$1500(ActivityThread.java:117)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:130)
        at android.app.ActivityThread.main(ActivityThread.java:3683)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:507)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
        at dalvik.system.NativeStart.main(Native Method)

我不知道该怎么做。谁能帮我检测电池状态。提前致谢。

这是 MainActivity.java 类

package com.example.batterycharging.Activity;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import com.example.suresh.batterycharging.R;


public class MainActivity extends ActionBarActivity {

    /*private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver() {
        @Override
        //When Event is published, onReceive method is called
        public void onReceive(Context c, Intent i) {
            //Get Battery %
            int level = i.getIntExtra("level", 0);
            //Find the progressbar creating in main.xml
            ProgressBar pb = (ProgressBar) findViewById(R.id.progressbar);
            //Set progress level with battery % value
            pb.setProgress(level);
            //Find textview control created in main.xml
            TextView tv = (TextView) findViewById(R.id.textfield);
            //Set TextView with text
            tv.setText("Battery Level: " + Integer.toString(level) + "%");
        }

    };*/


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//        registerReceiver(mBatInfoReceiver, new IntentFilter(
//                Intent.ACTION_BATTERY_CHANGED));
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1

您正在注册 BroadcastReceiver在 MainActivity 第 40 行.

您需要 unregisterReceiver(...)在 onPause() .

您需要注册 BroadcastReceiver在您的 AndroidManifest.xml文件或 registerReceiver(...) .你不应该两者都做。