java Android应用程序未打开黑屏问题

Question

几天前，我制作了一个简单的安卓 webview应用程序，它运行良好，但现在问题发生了，一段时间后，应用程序没有打开，屏幕变黑，然后重新安装，它是正确的，一段时间它是正确的，然后同样的问题就来了，如果有人帮助，那将是非常好的

Mi redmi note 6 Pro Android V 9 PIE

源代码

舱单。xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    package="com.musicwala.djaman" >
    <uses-permission 安卓:name="安卓.permission.INTERNET" />
    <uses-permission 安卓:name="安卓.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission 安卓:name="安卓.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission 安卓:name="安卓.permission.ACCESS_NETWORK_STATE"/>
    <application
        安卓:allowBackup="true"
        安卓:usesCleartextTraffic="true"
        安卓:icon="@drawable/main"
        安卓:label="@string/app_name"
        安卓:theme="@style/AppTheme"
        安卓:resizeableActivity="true">
        <activity

            安卓:name=".MainActivity"
            安卓:label="@string/app_name" 
            安卓:theme="@安卓:style/Theme.NoTitleBar.Fullscreen">

            <intent-filter>
                <action 安卓:name="安卓.intent.action.MAIN" />

                <category 安卓:name="安卓.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            安卓:name=".web_main">
        </activity>
        <activity
            安卓:name=".setting">
        </activity>
        <activity
            安卓:name=".about"
            安卓:theme="@安卓:style/Theme.NoTitleBar.Fullscreen">
        </activity>
        <activity
            安卓:name=".update">

        </activity>
        <activity
            安卓:name=".download">

        </activity>
        <activity 安卓:name=".play_ui"
            安卓:theme="@style/Theme.AppCompat.Light">

        </activity>
    </application>

</manifest>

建造。梯度

apply plugin: 'com.安卓.application'

安卓 {
    compileSdkVersion 29

    defaultConfig {
        applicationId "com.musicwala.djaman"
        minSdkVersion 14
        targetSdkVersion 29
        versionCode 3
        versionName "3.1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-安卓.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile ('安卓.arch.core:runtime:+') {
       force = true
}   

    compile 'com.安卓.support:appcompat-v7:27.+'
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

主要活动。java

package com.musicwala.djaman;

import 安卓.app.*;
import 安卓.os.*;
import 安卓.view.Window;
import 安卓.widget.AbsoluteLayout.LayoutParams;
import 安卓.view.WindowManager;
import 安卓.content.Intent;
import 安卓.util.Log;
import 安卓.net.NetworkInfo;
import 安卓.net.ConnectivityManager;
import 安卓.content.Context;
import 安卓.content.DialogInterface;
import 安卓.provider.Settings;
import 安卓.widget.Toast;

public class MainActivity extends Activity 
{
    
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        //requestWindowFeature(Window.FEATURE_NO_TITLE);
      //  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                            // WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.main);
        
        if(isNetworkConnectionAvailable() == true)
        {
            final Handler h = new Handler();

            h.postDelayed(new Runnable() {

                    @Override

                    public void run() {

                        //Do something after 1s   

                        Intent intent = new Intent(MainActivity.this,web_main.class);
                        startActivity(intent);
                        finish();
                    }

                }, 1000);
            
        }
    
    }
    public void checkNetworkConnection(){
        AlertDialog.Builder builder =new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("No internet Connection");
        builder.setMessage("Please turn on internet connection to continue!");
        builder.setPositiveButton("Turn On", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    MainActivity.this.startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
                }
            }).show();

        builder.setNegativeButton("Exit", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    finishAffinity();
                }
            }).show();

        AlertDialog alertDialog = builder.create();
        alertDialog.show();
        
    }

    public boolean isNetworkConnectionAvailable(){
        ConnectivityManager cm =
            (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        boolean isConnected = activeNetwork != null &&
            activeNetwork.isConnected();
        if(isConnected) {
            Log.d("Network", "Connected");
            return true;
        }
        else{
            checkNetworkConnection();
            Log.d("Network","Not Connected");
            return false;
        }
    }
    
    
}

在我的另一台设备中工作正常

Android v8.0 Oreo

Answer 1

清除手机缓存、数据并重新启动手机