Android studio

在android studio中 出现了 这个错误但是不影响运行 的但是看见报错就不舒服 想把这个处理掉

img

img


这个代码没有很复杂就是一个简单的网络获取数据 请问这个代码怎么能处理好

img

【相关推荐】



  • 这有个类似的问题, 你可以参考下: https://ask.csdn.net/questions/7666928
  • 我还给你找了一篇非常好的博客，你可以看看是否有帮助，链接：android studio布局设置手机号码不能超过11位
  • 除此之外, 这篇博客: Android Studio 基础 之 简单的多屏异显的功能实现的详细步骤，及相关简单整理中的 六、关键代码 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:

    1、DifferentDislay.java

    import android.app.Presentation;
import android.content.Context;
import android.os.Bundle;
import android.view.Display;

public class DifferentDislay extends Presentation {

    public DifferentDislay(Context outerContext, Display display) {
        super(outerContext,display);

    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mylayout);
    }
}

     

    2、MainActivity.java

    
import android.app.Activity;
import android.app.Application;
import android.app.Presentation;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.hardware.display.DisplayManager;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.WindowManager;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "XANTest";
    DifferentDislay mPresentation;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        GetPermission();

        multiScreenDisplay();
    }

    void multiScreenDisplay(){
        //双屏显示
        DisplayManager mDisplayManager;//屏幕管理类
        Display[] displays;//屏幕数组

        mDisplayManager =(DisplayManager)MainActivity.this.getSystemService(Context.DISPLAY_SERVICE);
        displays =mDisplayManager.getDisplays(); //得到显示器数组

        Log.i(TAG, "multiScreenDisplay: displays count = " + displays.length);

        if (displays.length > 1){

            mPresentation =new DifferentDislay
                    (getApplicationContext(),displays[1]);//displays[1]是副屏

            mPresentation.getWindow().setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);


//            if you use apiLevel >= 19, don't use
//
//            WindowManager.LayoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT
//
//            which gets the following error:
//
//            android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@40ec8528 -- permission denied for this window type
//
//            Use this instead:
//
//            LayoutParams.TYPE_TOAST or TYPE_APPLICATION_PANEL


            mPresentation.show();
        }


    }

    void GetPermission(){
        if(Build.VERSION.SDK_INT >= 23) {
            if (!Settings.canDrawOverlays(this)) {
                Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                        Uri.parse("package:" + getPackageName()));
                startActivityForResult(intent, 1234);
            }
        }
        else
        {
            Intent intent = new Intent(this, Service.class);
            startService(intent);
        }

    }

    @Override
    protected void onStop() {
        super.onStop();
        if (mPresentation != null) {
            mPresentation.dismiss();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mPresentation != null) {
            mPresentation.show();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mPresentation != null) {
            mPresentation.dismiss();
        }
    }


}

     

    3、AndroidManifest.xml

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.testmultiscreendisplay0407">

    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.TestMultiScreenDisplay0407">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

     

    4、activity_main.xml

    <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

     

    5、mylayout.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="658dp"
        android:layout_weight="1"
        android:text="MyTestScreen"
        android:textSize="100dp"
        />
</LinearLayout>

     


如果你已经解决了该问题, 非常希望你能够分享一下解决方案, 写成博客, 将相关链接放在评论区, 以帮助更多的人 ^-^