logSe中的mSecurityInputMethodService为null

问题描述

我写了一个 android 应用程序，该应用程序应显示智能手机的当前位置（最后一个已知位置）。虽然我复制了示例代码，并尝试了其他几种解决方案，但似乎每次都有相同的错误。我的应用程序由一个按钮组成。按下按钮应记录经度和纬度，但只记录mSecurityInputMethodService为空。

I wrote a little android app that should display the current location (last known location) of the smartphone. Although I copied the example code, and tried several other solutions, It seems to have the same error every time. My app consists of a button. Pressing the button should log the longitude and latitude, but only logs "mSecurityInputMethodService is null".

以下是 MainActivity.java ：

Here's the MainActivity.java:

public class MainActivity extends Activity {
int response;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button button = (Button)findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            onbutclick();
        }
    });

}
public void onbutclick(){
    LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED){
        Location loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if(loc != null){
            Log.d("Latitude",Double.toString(loc.getLatitude()));
            Log.d("Longitude",Double.toString(loc.getLongitude()));
        }

    }else{
        ActivityCompat.requestPermissions(this,new String[] {Manifest.permission.ACCESS_FINE_LOCATION},response);
        Intent inte = getIntent();
        finish();
        startActivity(inte);
    }
}

我也使用<在Manifest文件中使用权限> 。我真的很感激一个解释mSecurityInputMethodService为空真的意味着什么。

I also used <uses-permission> in the Manifest file. I would really appreciate an explanation what does "mSecurityInputMethodService is null" really means.

推荐答案

对于我的华为设备，以下帮助：

For my Huawei device the following helps:

拨号：

Dial:

*#*#2846579#*#*

并显示一个隐藏菜单。转到背景设置 - >日志设置并启用日志级别。

and a hidden menu is shown. Go to "Background Setting" -> "Log setting" and enable the log levels.

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