Question

我希望将电池信息接收到文本类型和＆＃34; level＆＃34;的值。无法在广播接收器外访问。如何在代码中访问广播接收器的电平值，以便在oncreate方法中使用它

    public BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
    @Override
    public void onReceive(Context ctxt, Intent intent) {
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
        batteryTxt.setText(String.valueOf(level) + "");


    }
};

Answer 1

如获取battery level only once using Android SDK中所述您可以使用以下代码：

 Intent batteryIntent = registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
 int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);

Answer 2

在你的oncreate方法中使用它：

在oncreate中声明你的textview

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

在该活动中实施接收器

private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
                    @Override
                    public void onReceive(Context ctxt, Intent intent) {
                      int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
                      Log.e("ebre", level+"**");
            batteryTxt.setText(String.valueOf(level) + "");
                    }
                  };

修改

只要您想激活接收器，只需使用它来呼叫接收器

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

如果您想要电池百分比，请在活动中声明它并使用该值。

如何将电池百分比值设为int值

2 个答案: