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  • android显示手机电量

    package com.basillee.asus.demo;
    
    import android.app.Notification;
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.content.IntentFilter;
    import android.os.BatteryManager;
    import android.support.v7.app.ActionBarActivity;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.widget.Button;
    import android.widget.TextView;
    
    
    public class MainActivity11 extends ActionBarActivity {
    
        private TextView textViewLevel=null;
        private int batteryLevel;
        private int batteryScale;
        private Button buttonBatteryShow;
        private BroadcastReceiver broadcastReceiver=new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                //获取当前电量,如未获取具体数值,则默认为0
                batteryLevel=intent.getIntExtra(BatteryManager.EXTRA_LEVEL,0);
                //获取最大电量,如未获取到具体数值,则默认为100
                batteryScale=intent.getIntExtra(BatteryManager.EXTRA_SCALE,100);
                //显示电量
                textViewLevel.setText("电量"+(batteryLevel*100/batteryScale)+"%");
            }
        };
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main_activity11);
            textViewLevel= (TextView) findViewById(R.id.textViewBattery);
            buttonBatteryShow= (Button) findViewById(R.id.button_show_battery);
            buttonBatteryShow.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    IntentFilter intentFilter=new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
                    //注册接收器以获取电量信息
                    registerReceiver(broadcastReceiver, intentFilter);
                }
            });
        }
    
    }
    

    http://jingyan.baidu.com/season/48891

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  • 原文地址:https://www.cnblogs.com/BasilLee/p/4320109.html
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