Question

我试图编译一个Android应用程序来从设备获取电池信息。应用程序成功编译，但当我在设备上使用它时，它无法打开。

我使用的代码如下：

package com.nitin.batteryinfo;

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.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private TextView batLevel;
    private TextView voltage;
    private TextView temp;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView batLevel = findViewById (R.id.batLevelView);
    TextView voltage = findViewById(R.id.voltView);
    TextView temp = findViewById(R.id.tempView);
    registerReceiver(this.batinf, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

}
private BroadcastReceiver batinf = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL,0);
        int volt = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE,0);
        int temps = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE,0);
        batLevel.setText("Battery Status:"+String.valueOf(level)+"%");
        voltage.setText("Battery Voltage:"+String.valueOf(volt));
        double t = (double) temps/10;
        temp.setText("Battery Temp:"+ String.valueOf(t));
    }
};}

Answer 1

如果您在安装应用时尝试安装APK文件并收到错误，那可能是因为您使用的是app-debug.apk而不是app-release.apk。

您需要通过生成签名的APK

来创建app-release.apk

编译的应用程序无法打开

1 个答案: