0

我正在尝试制作一个应用程序，它将显示我的一个项目的电池状态和电池信息。我想在应用程序中显示瞬时电流和电源，但我没有成功让它工作，我没有得到当前信息和电源信息，它只是停留在 2 并且插入了交流电源。如果您能帮助我编写代码，我将不胜感激。谢谢

import android.annotation.SuppressLint;

//import com.batterystatus.namespace.R;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {
private TextView level,voltage, status1,temp,health1,tech,sour,amp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        level=(TextView)findViewById(R.id.level);
        voltage=(TextView)findViewById(R.id.volt);
        status1=(TextView)findViewById(R.id.stat);
        temp=(TextView)findViewById(R.id.temp);
        health1=(TextView)findViewById(R.id.healt);
        tech=(TextView)findViewById(R.id.tech);
        sour=(TextView)findViewById(R.id.source);
        Button b = (Button) findViewById(R.id.ex);
        amp=(TextView)findViewById(R.id.current);
        b.setOnClickListener(new View.OnClickListener(){
             public void onClick(View v) {
                    // TODO Auto-generated method stub
                    finish();
                    System.exit(0);}
        });



        this.registerReceiver(this.myBatteryReceiver,
                 new IntentFilter(Intent.ACTION_BATTERY_CHANGED));


    }

    private BroadcastReceiver myBatteryReceiver
       = new BroadcastReceiver(){

     @SuppressLint("InlinedApi")
    @Override
     public void onReceive(Context arg0, Intent arg1) {
      // TODO Auto-generated method stub

      if (arg1.getAction().equals(Intent.ACTION_BATTERY_CHANGED)){

          int lv = arg1.getIntExtra("level", 0);
       level.setText("Level: "
         + String.valueOf(lv) + "%");

       voltage.setText("Voltage: "
                 + String.valueOf((float)arg1.getIntExtra("voltage", 0)/1000) + "V");
               temp.setText("Temperature: "
                 + String.valueOf((float)arg1.getIntExtra("temperature", 0)/10) + "c");
               tech.setText("Technology: " + arg1.getStringExtra("technology"));

               int status = arg1.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN);
               String strStatus;
               if (status == BatteryManager.BATTERY_STATUS_CHARGING){
                strStatus = "Charging";
               } else if (status == BatteryManager.BATTERY_STATUS_DISCHARGING){
                strStatus = "Dis-charging";
               } else if (status == BatteryManager.BATTERY_STATUS_NOT_CHARGING){
                strStatus = "Not charging";
               } else if (status == BatteryManager.BATTERY_STATUS_FULL){
                strStatus = "Full";
               } else {
                strStatus = "Unknown";
               }
               status1.setText("Status: " + strStatus);

               int source=arg1.getIntExtra("source", BatteryManager.BATTERY_STATUS_UNKNOWN);
               **int current=arg1.getIntExtra("current", BatteryManager.BATTERY_PROPERTY_CURRENT_NOW);
               amp.setText("Current: "+String.valueOf(current));
               String strsource = null;

            if(source==BatteryManager.BATTERY_PLUGGED_AC){strsource="AC Power Plugged";}
              else if (source==BatteryManager.BATTERY_PLUGGED_USB){strsource="USB Plugged";}
              sour.setText("Power Source: "+ strsource);**
               int health = arg1.getIntExtra("health", BatteryManager.BATTERY_HEALTH_UNKNOWN);
               String strHealth;
               if (health == BatteryManager.BATTERY_HEALTH_GOOD){
                strHealth = "Good";
               } else if (health == BatteryManager.BATTERY_HEALTH_OVERHEAT){
                strHealth = "Over Heat";
               } else if (health == BatteryManager.BATTERY_HEALTH_DEAD){
                strHealth = "Dead";
               } else if (health == BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE){
                strHealth = "Over Voltage";
               } else if (health == BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE){
                strHealth = "Unspecified Failure";
               } else{
                strHealth = "Unknown";
               }
               health1.setText("Health: " + strHealth);

              }
             }

               };
    @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;
    }

    @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();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}
4

1 回答 1

2

无需注册ACTION_BATTERY_CHANGED广播，只需执行以下操作：

BatteryManager mBatteryManager = (BatteryManager)Context.getSystemService(Context.BATTERY_SERVICE);

然后使用mBatteryManager获取您想要的任何信息。如果您希望它在某个时间间隔内，AlarmManager可能会有用。

请注意，并非所有手机都能为您提供瞬时功率或您可能正在寻找的其他一些指标。据我所知，Nexus 6 手机是唯一能够提供瞬时供电的手机。这是一个很好的参考，可以更好地帮助你。 https://source.android.com/devices/tech/power/device.html

于 2015-10-29T20:25:56.300 回答