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【转载】Android电池电量监听

Android 王 伟 167浏览 0评论

监听电池状态只需要接收Intent.ACTION_BATTERY_CHANGED的广播即可,当电池状态发生变化时会发出广播。

1.运行状态如下图:

1.充电中的状态

2.未充电时的状态

2.实现代码如下,各个状态通过名字就很容易知道意思,BatteryManager类中定义了电池状态。

public class MainActivity extends Activity {  
    private static final String TAG = "MainActivity";  
      
    private TextView mTvVoltage;  
    private TextView mTvTemperature;  
    private TextView mTvLevel;  
    private TextView mTvStatus;  
    private TextView mTvHealth;  
    private TextView mTvTechnology;  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
          
        mTvVoltage = (TextView)findViewById(R.id.tv_voltage);  
        mTvTemperature = (TextView)findViewById(R.id.tv_temperature);  
        mTvLevel = (TextView)findViewById(R.id.tv_level);  
        mTvStatus = (TextView)findViewById(R.id.tv_status);  
        mTvHealth = (TextView)findViewById(R.id.tv_health);  
        mTvTechnology = (TextView)findViewById(R.id.tv_technology);  
          
        this.registerReceiver(this.mBatteryReceiver, 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.main, menu);  
        return true;  
    }  
  
    private BroadcastReceiver mBatteryReceiver = new BroadcastReceiver() {    
        @Override  
        public void onReceive(Context arg0, Intent arg1) {    
            int voltage=arg1.getIntExtra(BatteryManager.EXTRA_VOLTAGE, 0);  
            mTvVoltage.setText("电压:" + voltage / 1000 + "." + voltage % 1000 + "V");  
                
            int temperature=arg1.getIntExtra(BatteryManager.EXTRA_TEMPERATURE,0);  
            mTvTemperature.setText("温度:" + temperature / 10 + "." + temperature % 10 + "℃");  
            if (temperature >= 300) {  
                mTvTemperature.setTextColor(Color.RED);  
            } else {  
                mTvTemperature.setTextColor(Color.BLUE);  
            }  
              
            int level=arg1.getIntExtra(BatteryManager.EXTRA_LEVEL,0);  
            int scale=arg1.getIntExtra(BatteryManager.EXTRA_SCALE,0);  
            int levelPercent = (int)(((float)level / scale) * 100);  
            mTvLevel.setText("电量:" + levelPercent + "%");  
            if (level <= 10) {  
                mTvLevel.setTextColor(Color.RED);  
            } else {  
                mTvLevel.setTextColor(Color.BLUE);  
            }  
                
            int status = arg1.getIntExtra(BatteryManager.EXTRA_STATUS, BatteryManager.BATTERY_STATUS_UNKNOWN);  
            String strStatus = "未知状态";;  
            switch (status) {  
            case BatteryManager.BATTERY_STATUS_CHARGING:  
                strStatus = "充电中……";  
                break;  
            case BatteryManager.BATTERY_STATUS_DISCHARGING:  
                strStatus = "放电中……";  
                break;  
            case BatteryManager.BATTERY_STATUS_NOT_CHARGING:  
                strStatus = "未充电";  
                break;  
            case BatteryManager.BATTERY_STATUS_FULL:  
                strStatus = "充电完成";  
                break;  
            }  
            mTvStatus.setText("状态:" + strStatus);  
                
            int health = arg1.getIntExtra(BatteryManager.EXTRA_HEALTH, BatteryManager.BATTERY_HEALTH_UNKNOWN);  
            String strHealth = "未知 :(";;  
            switch (status) {  
            case BatteryManager.BATTERY_HEALTH_GOOD:  
                strHealth = "好 :)";  
                break;  
            case BatteryManager.BATTERY_HEALTH_OVERHEAT:  
                strHealth = "过热!";  
                break;  
            case BatteryManager.BATTERY_HEALTH_DEAD: // 未充电时就会显示此状态,这是什么鬼?  
                strHealth = "良好";  
                break;  
            case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:  
                strHealth = "电压过高!";  
                break;  
            case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:  
                strHealth = "未知 :(";  
                break;  
            case BatteryManager.BATTERY_HEALTH_COLD:  
                strHealth = "过冷!";  
                break;  
            }  
            mTvHealth.setText("健康状况:" + strHealth);  
              
            String technology = arg1.getStringExtra(BatteryManager.EXTRA_TECHNOLOGY);  
            mTvTechnology.setText("电池技术:" + technology);  
        }  
    };  
}

3.Layout布局如下,很简单只有几个TextView:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                xmlns:tools="http://schemas.android.com/tools" 
                android:layout_width="match_parent" 
                android:layout_height="match_parent" 
                android:paddingBottom="@dimen/activity_vertical_margin" 
                android:paddingLeft="@dimen/activity_horizontal_margin" 
                android:paddingRight="@dimen/activity_horizontal_margin" 
                android:paddingTop="@dimen/activity_vertical_margin" 
                tools:context=".MainActivity" >  
  
    <TextView android:id="@+id/tv_battery_status" 
              android:layout_width="wrap_content" 
              android:layout_height="wrap_content" 
              android:textColor="#0000FF" 
              android:textStyle="bold" 
              android:text="@string/battery_status" />  
  
    <LinearLayout android:layout_width="match_parent" 
                  android:layout_height="wrap_content" 
                  android:orientation="vertical" 
                  android:layout_below="@id/tv_battery_status" >  
        <TextView android:id="@+id/tv_voltage" 
                  android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" />  
        <TextView android:id="@+id/tv_temperature" 
                  android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" />  
        <TextView android:id="@+id/tv_level" 
                  android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" />  
        <TextView android:id="@+id/tv_status"
                  android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" />  
        <TextView android:id="@+id/tv_health"
                  android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" />  
        <TextView android:id="@+id/tv_technology" 
                  android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" />  
       </LinearLayout>  
</RelativeLayout>

转载于:http://blog.csdn.net/ameyume/article/details/46523295

转载时请注明出处及相应链接,本文永久地址:http://blog.it985.com/22377.html


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