Java ANDROID STUDIO构建成功,但没有';跑不动
我刚刚创建了我的第一个android应用程序,复制了此视频中的代码: 应用程序构建时没有问题,但当我尝试运行它时,它突然关闭 这是调试器的消息:Java ANDROID STUDIO构建成功,但没有';跑不动,java,android,android-studio,debugging,cs50,Java,Android,Android Studio,Debugging,Cs50,我刚刚创建了我的第一个android应用程序,复制了此视频中的代码: 应用程序构建时没有问题,但当我尝试运行它时,它突然关闭 这是调试器的消息: 12/02 12:19:56: Launching 'app' on Pixel_3a_API_30_x86. Install successfully finished in 519 ms. $ adb shell am start -n "com.example.pokedex/com.example.pokedex.MainActi
12/02 12:19:56: Launching 'app' on Pixel_3a_API_30_x86.
Install successfully finished in 519 ms.
$ adb shell am start -n "com.example.pokedex/com.example.pokedex.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D
Waiting for application to come online: com.example.pokedex | com.example.pokedex.test
Waiting for application to come online: com.example.pokedex | com.example.pokedex.test
Connecting to com.example.pokedex
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
W/ActivityThread: Application com.example.pokedex is waiting for the debugger on port 8100...
I/System.out: Sending WAIT chunk
I/System.out: Debugger has connected
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
Connected to the target VM, address: 'localhost:52033', transport: 'socket'
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/System.out: waiting for debugger to settle...
I/chatty: uid=10153(com.example.pokedex) identical 2 lines
I/System.out: waiting for debugger to settle...
I/System.out: debugger has settled (1475)
D/NetworkSecurityConfig: No Network Security Config specified, using platform default
D/NetworkSecurityConfig: No Network Security Config specified, using platform default
D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
W/example.pokede: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed)
W/example.pokede: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.pokedex, PID: 8349
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.pokedex/com.example.pokedex.MainActivity}: android.view.InflateException: Binary XML file line #2 in com.example.pokedex:layout/activity_main: Binary XML file line #2 in com.example.pokedex:layout/activity_main: Error inflating class android.support.constraint.ConstraintLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: android.view.InflateException: Binary XML file line #2 in com.example.pokedex:layout/activity_main: Binary XML file line #2 in com.example.pokedex:layout/activity_main: Error inflating class android.support.constraint.ConstraintLayout
Caused by: android.view.InflateException: Binary XML file line #2 in com.example.pokedex:layout/activity_main: Error inflating class android.support.constraint.ConstraintLayout
Caused by: java.lang.ClassNotFoundException: android.support.constraint.ConstraintLayout
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:454)
at android.view.LayoutInflater.createView(LayoutInflater.java:813)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1004)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
at android.view.LayoutInflater.inflate(LayoutInflater.java:657)
at android.view.LayoutInflater.inflate(LayoutInflater.java:532)
at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.pokedex.MainActivity.onCreate(MainActivity.java:19)
at android.app.Activity.performCreate(Activity.java:8000)
at android.app.Activity.performCreate(Activity.java:7984)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.constraint.ConstraintLayout" on path: DexPathList[[zip file "/data/app/~~ikbXqJo2xtaJUvZzC7gM8Q==/com.example.pokedex-kRHbfAkGOaaI21CGLAjxuQ==/base.apk"],nativeLibraryDirectories=[/data/app/~~ikbXqJo2xtaJUvZzC7gM8Q==/com.example.pokedex-kRHbfAkGOaaI21CGLAjxuQ==/lib/x86, /system/lib, /system_ext/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 26 more
I/Process: Sending signal. PID: 8349 SIG: 9
Disconnected from the target VM, address: 'localhost:52033', transport: 'socket'
这是我的主要活动:
package com.example.pokedex;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView=findViewById(R.id.recycler_view);
adapter=new PokedexAdapter();
layoutManager=new LinearLayoutManager(this);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(layoutManager);
}
}
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">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recycler_view"/>
</android.support.constraint.ConstraintLayout>
Pokedex_row:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/pokedex_row">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/pokedex_row_text_view"/>
</LinearLayout>
Android Manifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.pokedex">
<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.Pokedex">
<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>
我已经尝试解决这个问题好几天了,所以如果有人能帮助我,我将非常感激 我认为ConstraintLayout有问题,您可以共享您的xml文件吗,这样我可以帮助您解决问题。我不时遇到此错误,并通过执行以下操作来解决此问题:
- 首先,检查您的
应用程序
配置中是否有Gradle
实现ConstraintLayout
- 然后确保布局
XML文件中没有错误(可能是语义错误)
如果错误仍然存在,请考虑将这两个文件添加到问题描述中,这样就可以很容易地帮助
祝你好运 已尝试将ConstraintLayout更改为使用androidx而不是支持 尝试将activity_main.xml的开始标记更改为:
您有一些与MainActivity和xml膨胀相关的问题。如果您从该活动中粘贴onCreate,将非常有用。看起来您遇到了。非常感谢。现在可以了。我花了很多天的时间在这上面,再次感谢!!