java - 尽管没有对代码进行任何更改，但 MainActivity 不再从 startActivity(i) 启动

标签 java android android-intent android-activity dependencies

几天前，我的应用程序在多个设备上停止运行。该代码至少一年没有被触及(即:最近没有进行任何更改)。它从 SplashScreenActivity 开始，从 SQL 数据库下载一些数据，效果很好。之后，这些数据被 putExtra 到用于启动 MainActivity 的 Intent - 这就是应用程序突然关闭的地方。通过调试，我知道 Intent 仍然被正确创建，但在 MainActivity 中“onCreate”未被调用。我不知道中间是什么以及为什么它停止工作，也许与依赖性有关？有什么想法吗？

下面是 SplashScreen 的代码和 MainActivity 的 onCreate 方法，以及 build.gradle (应用程序)，我在其中做了一些更改试图解决问题(已弃用的编译更改为实现和依赖项的版本和 sdkVersion )。这并没有解决问题。

构建.gradle:


    apply plugin: 'com.android.application'
    
    android {
        compileSdkVersion 26
        buildToolsVersion '26.0.2'
        defaultConfig {
            applicationId "com.myname.myapp"
            minSdkVersion 19
            targetSdkVersion 26
            versionCode 14
            versionName "1.51"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
            multiDexEnabled true
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
        compileOptions {
            targetCompatibility = 1.8
            sourceCompatibility = 1.8
        }
    }
    
    dependencies {
        implementation fileTree(dir: 'libs', include: ['*.jar'])
        androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })
        implementation 'com.android.support:multidex:1.0.3'
        implementation 'com.android.support:appcompat-v7:26.1.0'
        implementation 'com.android.support:recyclerview-v7:26.1.0'
        implementation 'com.google.android.gms:play-services:12.0.1'
        testImplementation 'junit:junit:4.12'
    }

启动画面 Activity :


    package com.myname.myapp;
    
    import android.app.Activity;
    import android.content.Context;
    import android.content.Intent;
    import android.content.SharedPreferences;
    import android.net.ConnectivityManager;
    import android.net.NetworkInfo;
    import android.os.Bundle;
    import android.preference.PreferenceManager;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import java.util.ArrayList;
    
    public class SplashScreen extends Activity {
    
        private String mAccessCode; // --> DatabaseID
        public String getmAccessCode() {
            return mAccessCode;
        }
        public void setmAccessCode(String mAccessCode) {
            this.mAccessCode = mAccessCode;
        }
    
        private String getPrefsString(String prefName) {
            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
            return sharedPreferences.getString(prefName, getString(R.string.default_access_code));
    
        }
    
        public boolean isOnline() {
            ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
            return (networkInfo != null && networkInfo.isConnected());
        }
    
        ArrayList<String> strResult = new ArrayList<>();
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_splash);
            TextView textViewVersionName = findViewById(R.id.textViewVersionName);
            textViewVersionName.setText("Version " + BuildConfig.VERSION_NAME);
    
            setmAccessCode(getPrefsString("AccessCode"));
    
            if (isOnline()) {

            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_users), "0", getString(R.string.url_receive), getmAccessCode()));
                    strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_ridesByDate), "0", getString(R.string.url_receive), getmAccessCode()));
                    strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_ridesByDriverID), "0", getString(R.string.url_receive), getmAccessCode()));
                    strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_passengersByDate), "0", getString(R.string.url_receive), getmAccessCode()));
                    Intent i = new Intent(SplashScreen.this, MainActivity.class);
                    i.putStringArrayListExtra("tableContents", strResult);
                    startActivity(i);
                    finish();
                }

            }, 1500);
    
            } else {
            Toast toast = Toast.makeText(getApplicationContext(), R.string.connection_error, Toast.LENGTH_LONG);
            toast.show();
            finish();
        }
        }
    }

主要 Activity :


    @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Intent i = getIntent();
            ArrayList<String> tableContents = i.getStringArrayListExtra("tableContents");
            initActivity(tableContents);
    
        }

如果还有什么需要补充的，欢迎留言。感谢您的帮助!

编辑:这是日志

2019-09-17 10:25:35.127 13305-13305/? I/name.myap: Not late-enabling -Xcheck:jni (already on)
2019-09-17 10:25:35.151 13305-13305/? E/name.myap: Unknown bits set in runtime_flags: 0x8000
2019-09-17 10:25:35.153 13305-13305/? W/name.myap: Unexpected CPU variant for X86 using defaults: x86
2019-09-17 10:25:35.230 13305-13305/? I/name.myap: The ClassLoaderContext is a special shared library.
2019-09-17 10:25:36.608 13305-13305/com.myname.myapp I/MultiDex: VM with version 2.1.0 has multidex support
2019-09-17 10:25:36.608 13305-13305/com.myname.myapp I/MultiDex: Installing application
2019-09-17 10:25:36.608 13305-13305/com.myname.myapp I/MultiDex: VM has multidex support, MultiDex support library is disabled.
2019-09-17 10:25:36.626 13305-13305/com.myname.myapp I/FirebaseInitProvider: FirebaseApp initialization unsuccessful
2019-09-17 10:25:36.644 13305-13338/com.myname.myapp D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
2019-09-17 10:25:36.644 13305-13338/com.myname.myapp W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission denied)
2019-09-17 10:25:36.634 13305-13305/com.myname.myapp W/RenderThread: type=1400 audit(0.0:70): avc: denied { write } for name="property_service" dev="tmpfs" ino=6782 scontext=u:r:untrusted_app_27:s0:c512,c768 tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0
2019-09-17 10:25:36.703 13305-13338/com.myname.myapp D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
2019-09-17 10:25:36.710 13305-13338/com.myname.myapp D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
2019-09-17 10:25:36.719 13305-13338/com.myname.myapp D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
2019-09-17 10:25:36.803 13305-13341/com.myname.myapp D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2019-09-17 10:25:36.831 13305-13336/com.myname.myapp W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
2019-09-17 10:25:36.862 13305-13336/com.myname.myapp D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 0 0
2019-09-17 10:25:36.862 13305-13336/com.myname.myapp D/EGL_emulation: eglCreateContext: 0xe5bf00a0: maj 2 min 0 rcv 2
2019-09-17 10:25:36.872 13305-13336/com.myname.myapp D/EGL_emulation: eglMakeCurrent: 0xe5bf00a0: ver 2 0 (tinfo 0xf0da9bd0)
2019-09-17 10:25:36.903 13305-13336/com.myname.myapp W/Gralloc3: mapper 3.x is not supported
2019-09-17 10:25:36.925 13305-13336/com.myname.myapp D/EGL_emulation: eglMakeCurrent: 0xe5bf00a0: ver 2 0 (tinfo 0xf0da9bd0)
2019-09-17 10:25:36.947 13305-13336/com.myname.myapp D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 1 0

编辑 2:现在有一条新的错误消息可能会有所帮助:


    2019-09-17 13:28:13.400 1669-2304/? E/ActivityManager: Second failure launching com.myname.myapp/.MainActivity, giving up
        android.os.TransactionTooLargeException: data parcel size 520984 bytes
            at android.os.BinderProxy.transactNative(Native Method)
            at android.os.BinderProxy.transact(Binder.java:748)
            at android.app.IApplicationThread$Stub$Proxy.scheduleLaunchActivity(IApplicationThread.java:1230)
            at com.android.server.am.ActivityStackSupervisor.realStartActivityLocked(ActivityStackSupervisor.java:1467)
            at com.android.server.am.ActivityStackSupervisor.attachApplicationLocked(ActivityStackSupervisor.java:972)
            at com.android.server.am.ActivityManagerService.attachApplicationLocked(ActivityManagerService.java:6958)
            at com.android.server.am.ActivityManagerService.attachApplication(ActivityManagerService.java:7025)
            at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:291)
            at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2935)
            at android.os.Binder.execTransact(Binder.java:674)
    2019-09-17 13:28:13.434 1669-1690/? E/ViewRootImpl[myapp]: Attempting to destroy the window while drawing!
          window=android.view.ViewRootImpl@da270ff, title=Splash Screen com.myname.myapp

最佳答案

您尚未共享 Logcat 错误堆栈，这将有助于进一步了解该问题。但似乎您正在尝试从新线程而不是 UI 线程启动 Activity ，因此应用程序崩溃，只需移出可运行 run 方法内的代码，并且不要启动新线程。如果由于某种原因您希望代码异步运行，请通过处理程序运行您的 Runnable。下面是 fragment 

if (isOnline()) {

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_users), "0", getString(R.string.url_receive), getmAccessCode()));
            strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_ridesByDate), "0", getString(R.string.url_receive), getmAccessCode()));
            strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_ridesByDriverID), "0", getString(R.string.url_receive), getmAccessCode()));
            strResult.add(new DataTransfer().receiveDataFromDatabase(getString(R.string.sql_id_passengersByDate), "0", getString(R.string.url_receive), getmAccessCode()));
            Intent i = new Intent(SplashScreen.this, MainActivity.class);
            i.putStringArrayListExtra("tableContents", strResult);
            startActivity(i);
            finish();
        }

    },1000);
}

关于java - 尽管没有对代码进行任何更改，但 MainActivity 不再从 startActivity(i) 启动，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57970078/

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