E/Android运行时：致命异常：主进程：com.example.gameshopservicesdz，PID：14488

Question

• 我正在制作一个运行欢迎屏幕的应用程序，但当我尝试运行我的应用程序android版本，比如7.0甚至7.1时，它会在setcontentview（activity_main）上出错
• 但当我试着运行我的应用程序android 11版时，它会从任何问题开始

我的应用程序在ver上运行的原始序列。11

如果我打开启动屏幕活动，欢迎后启动屏幕出现错误

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.gameshopservicesdz, PID: 13950
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.gameshopservicesdz/com.example.gameshopservicesdz.SplashScreenActivity}: android.view.InflateException: Binary XML file line #7: Binary XML file line #7: Error inflating class android.support.constraint.ConstraintLayout
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2698)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2759)
        at android.app.ActivityThread.-wrap12(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1482)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6190)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:892)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)
     Caused by: android.view.InflateException: Binary XML file line #7: Binary XML file line #7: Error inflating class android.support.constraint.ConstraintLayout
     Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class android.support.constraint.ConstraintLayout
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.constraint.ConstraintLayout" on path: DexPathList[[zip file "/data/app/com.example.gameshopservicesdz-2/base.apk"],nativeLibraryDirectories=[/data/app/com.example.gameshopservicesdz-2/lib/x86, /data/app/com.example.gameshopservicesdz-2/base.apk!/lib/x86, /system/lib, /vendor/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.view.LayoutInflater.createView(LayoutInflater.java:609)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
        at com.example.gameshopservicesdz.SplashScreenActivity.onCreate(SplashScreenActivity.java:18)
        at android.app.Activity.performCreate(Activity.java:6698)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2651)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2759)
        at android.app.ActivityThread.-wrap12(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1482)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6190)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:892)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)

溅起水花。爪哇：

//error in setContentView(R.layout.activity_splash_screen);

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


    getSupportActionBar().hide();
    getWindow().setStatusBarColor(ContextCompat.getColor(this, R.color.white_2));

    SharedPreferences preferences = getSharedPreferences("intro", MODE_PRIVATE);
    String intro = preferences.getString("state", "");

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            //if second time
            if (intro.equals("done")) {
                Intent intent = new Intent(getApplicationContext(), MainActivity.class);
                startActivity(intent);
                finish();
            } else {
                //if first time
                Intent intent = new Intent(getApplicationContext(), IntroScreenActivity.class);
                startActivity(intent);
                finish();
            }
        }
    }, 2300);
}

}

Answer 1

将您的android.support.constraint.ConstraintLayout更改为androidx.constraintlayout.widget.ConstraintLayout

Answer 2

我想你在写这段代码时参考了一些旧的留档或教程。

你应该做的第一件事就是使用androidx。我很年轻。小装置。ConstraintLayout而不是android。支持限制ConstraintLayout，因为android的。支持限制ConstraintLayout被标记为已弃用（即，不应使用该选项，它将被删除，将来不可用。）

回到您的问题，这是由于Android无法找到ConstraintLayout的类造成的。由于ConstraintLayout不是Android SDK的一部分，您需要使用以下代码在应用的build.gradle文件（位于app/build.gradle或app/build.gradle.kts）中添加ConstraintLayout的依赖项：

implementation "androidx.constraintlayout:constraintlayout:2.1.3"

添加后，只需同步您的项目并重建。这将解决您的问题。

此外，您还可以在以下网站上阅读有关约束布局的更多信息：https://developer.android.com/training/constraint-layout