Android模拟器停止

时间:2012-05-11 07:14:45

标签: android multithreading android-intent android-emulator

所以我一直有问题让这个运行。这是一个直接从android基础培训中获取的教程。我收到以下错误消息:

  

05-11 06:59:39.457:W / dalvikvm(623):threadid = 1:线程退出时未捕获异常(group = 0x409c01f8)   05-11 06:59:39.617:E / AndroidRuntime(623):致命异常:主要   05-11 06:59:39.617:E / AndroidRuntime(623):java.lang.IllegalStateException:无法执行活动的方法   05-11 06:59:39.617:E / AndroidRuntime(623):在android.view.View $ 1.onClick(View.java:3044)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.view.View.performClick(View.java:3511)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.view.View $ PerformClick.run(View.java:14105)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.os.Handler.handleCallback(Handler.java:605)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.os.Handler.dispatchMessage(Handler.java:92)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.os.Looper.loop(Looper.java:137)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.app.ActivityThread.main(ActivityThread.java:4424)   05-11 06:59:39.617:E / AndroidRuntime(623):at java.lang.reflect.Method.invokeNative(Native Method)   05-11 06:59:39.617:E / AndroidRuntime(623):at java.lang.reflect.Method.invoke(Method.java:511)   05-11 06:59:39.617:E / AndroidRuntime(623):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:784)   05-11 06:59:39.617:E / AndroidRuntime(623):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)   05-11 06:59:39.617:E / AndroidRuntime(623):at dalvik.system.NativeStart.main(Native Method)   05-11 06:59:39.617:E / AndroidRuntime(623):引起:java.lang.reflect.InvocationTargetException   05-11 06:59:39.617:E / AndroidRuntime(623):at java.lang.reflect.Method.invokeNative(Native Method)   05-11 06:59:39.617:E / AndroidRuntime(623):at java.lang.reflect.Method.invoke(Method.java:511)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.view.View $ 1.onClick(View.java:3039)   05-11 06:59:39.617:E / AndroidRuntime(623):......还有11个   05-11 06:59:39.617:E / AndroidRuntime(623):引起:android.content.ActivityNotFoundException:无法找到显式活动类{com.example.namespace / com.example.namespace.DisplayMessageActivity};你有没有在AndroidManifest.xml中声明这个活动?   05-11 06:59:39.617:E / AndroidRuntime(623):在android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.app.Activity.startActivityForResult(Activity.java:3190)   05-11 06:59:39.617:E / AndroidRuntime(623):在android.app.Activity.startActivity(Activity.java:3297)   05-11 06:59:39.617:E / AndroidRuntime(623):at com.example.namespace.MyFirstAppActivity.sendMessage(MyFirstAppActivity.java:25)   05-11 06:59:39.617:E / AndroidRuntime(623):... 14更多   05-11 06:59:40.477:I / dalvikvm(623):threadid = 3:对信号3作出反应

这是我的两个java文件,

package com.example.namespace;

    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.widget.TextView;

    public class DisplayMessageActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Get the message from the intent
    Intent intent = getIntent();
    String message = intent.getStringExtra(MyFirstAppActivity.EXTRA_MESSAGE);

    // Create the text view
    TextView textView = new TextView(this);
    textView.setTextSize(40);
    textView.setText(message);

    setContentView(textView);
}
}

package com.example.namespace;

 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.EditText;

 public class MyFirstAppActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myapp.MESSAGE";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}


public void sendMessage(View view) {
    // Do something in response to button
    Intent intent = new Intent(this, DisplayMessageActivity.class);
    EditText editText = (EditText) findViewById(R.id.edit_message);
    String message = editText.getText().toString();
    intent.putExtra(EXTRA_MESSAGE, message);
    startActivity(intent);
}
}

这是我的androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.namespace"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk android:minSdkVersion="15" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
     <activity android:name="com.example.myapp.DisplayMessageActivity" />
    <activity
        android:name=".MyFirstAppActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

和我的main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal">
<EditText android:id="@+id/edit_message"
    android:layout_weight="1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:hint="@string/edit_message" />
<Button android:id="@+id/button_send"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/button_send" 
    android:onClick="sendMessage"/>
 </LinearLayout>

每次我运行这个时,都会调用“sendMessage”,我得到“不幸的是,myFirstApp已经停止了”。有什么建议吗?

2 个答案:

答案 0 :(得分:1)

我认为这应该是

  android:name="com.example.myapp.DisplayMessageActivity"

更改为

  android:name="com.example.namespace.DisplayMessageActivity"

因为没有包 com.example.myapp

答案 1 :(得分:1)

日志中的答案。 “你有没有在AndroidManifest.xml中声明这个活动?”

将活动DisplayMessageActivity添加到AndroidManifest.xml

<activity android:name=".DisplayMessageActivity" />