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Asked:2022-03-18 06:31:57 +0000 UTC2022-03-18 06:31:57 +0000 UTC

应用程序崩溃并出现错误 E/AndroidRuntime: FATAL EXCEPTION: main

  • 772

单击按钮时应用程序崩溃，完全错误：

2021-03-18 07:28:44.060 10712-10712/com.slavatar.unimedia E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.slavatar.unimedia, PID: 10712
java.lang.IllegalStateException: Could not execute method for android:onClick
    at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:414)
    at android.view.View.performClick(View.java:7448)
    at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
    at android.view.View.performClickInternal(View.java:7425)
    at android.view.View.access$3600(View.java:810)
    at android.view.View$PerformClick.run(View.java:28305)
    at android.os.Handler.handleCallback(Handler.java:938)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    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$MethodAndArgsCaller.run(RuntimeInit.java:592)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
 Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409)
    at android.view.View.performClick(View.java:7448) 
    at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119) 
    at android.view.View.performClickInternal(View.java:7425) 
    at android.view.View.access$3600(View.java:810) 
    at android.view.View$PerformClick.run(View.java:28305) 
    at android.os.Handler.handleCallback(Handler.java:938) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    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$MethodAndArgsCaller.run(RuntimeInit.java:592) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
 Caused by: java.lang.IllegalStateException: Cannot execute task: the task has already been executed (a task can be executed only once)
    at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:716)
    at android.os.AsyncTask.execute(AsyncTask.java:671)
    at com.slavatar.unimedia.MainActivity.onClick(MainActivity.java:37)
    at java.lang.reflect.Method.invoke(Native Method) 
    at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409) 
    at android.view.View.performClick(View.java:7448) 
    at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119) 
    at android.view.View.performClickInternal(View.java:7425) 
    at android.view.View.access$3600(View.java:810) 
    at android.view.View$PerformClick.run(View.java:28305) 
    at android.os.Handler.handleCallback(Handler.java:938) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    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) 
    2021-03-18 07:28:44.124 10712-10712/com.slavatar.unimedia I/Process: Sending signal. PID: 10712 
    SIG: 9

主要活动代码：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    HttpActivity httpActivity = new HttpActivity();
    EditText adressEntry;
    EditText passwordEntry;
    Button startBtn;

    String web;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.auth);
    }


    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.startBtn:
                setContentView(R.layout.activity_main);
                break;

            case R.id.stopPauseVid:
                httpActivity.execute("http://192.168.0.6:5000/1234/code/1");
        }
    }
}
java

1 个回答

  1. Best Answer

    错误说：一个任务只能执行一次。
    这意味着AsyncTask您不能重复使用，并且必须为每次运行创建一个新实例：

        @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.startBtn:
                setContentView(R.layout.activity_main);
                break;

            case R.id.stopPauseVid:
                httpActivity = new HttpActivity();
                httpActivity.execute("http://192.168.0.6:5000/1234/code/1");
        }
    }
    • 3

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