Android应用无法在所有Android手机上正常运行

Question

我正在做一个android应用程序来测量android手机电池的属性。 但是，当生成要测试的apk文件时，它适用于某些手机，但不适用于每部Android手机。 这是我的代码。 让我知道是否需要更改任何内容。 非常感谢。

@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);
           if(Build.VERSION.SDK_INT >= 20){
         BatteryManager battery = (BatteryManager)getSystemService(Context.BATTERY_SERVICE);
         int current=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CURRENT_NOW);
         int currentAvg=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CURRENT_AVERAGE);
         int energy=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_ENERGY_COUNTER);
         int capacity=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CHARGE_COUNTER);
         int bCapacity=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);
         String string1 = "Current: "+ current*1000+" uA"+"\n";
         string1+="Average Current: "+currentAvg+" uA"+"\n";
         string1+="Remaining energy: "+energy+" nWh"+"\n";
         string1+="Capacity: "+capacity+" uAh"+"\n\n";

         amp.setText(string1);
           }


           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);
  }
}

Answer 1

我认为是因为这段代码：

if（Build.VERSION.SDK_INT> = 20）{BatteryManager battery =（BatteryManager）getSystemService（Context.BATTERY_SERVICE）;
.......
.......
.......
}

因此，您的代码仅适用于Kitkat服装，Lollypop及更高版本。

Answer 2

if(Build.VERSION.SDK_INT >= 20){ BatteryManager battery =(BatteryManager)getSystemService(Context.BATTERY_SERVICE);
.......
....... 
.
......
}

此代码行仅适用于Android SDK版本20及更高版本 。 创建项目时，必须将最小SDK设置为较低的值。 否则，只有运行此SDK之上的android设备的android用户才能正常运行它。 您的代码仅适用于运行KitKat及更高版本的设备。

Answer 3

通过使用以下命令： Build.VERSION.SDK_INT >= 20如果用户至少没有Kitkat服装，Lollypop和所有后续版本，就可以阻止您的应用正常运行。

问题是，如果您希望它为您的用户服务，则有两种解决方案。

• 1个

您必须在清单文件中设置最低sdk版本，以防止sdk版本低于20的用户遇到崩溃。

要设置目标API和最低API级别，请使用以下示例gradle文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        ...
        minSdkVersion 20 // THIS LINE ENSURE THAT THE USER WITH A SDK LOWER THAN  20 CANT USE THE APP
        targetSdkVersion (your targetted version)
    }
    buildTypes {
        release {
            ...
    }
}

• 2

您还必须找到一种方法来使您的用户也使用低于20的sdk。