开始一个新的活动按钮按下按钮

Question

我想要一个新的活动开始，当我按下“createAppointment”按钮，但到目前为止，当我点击按钮，应用程序崩溃。

的按钮创建：

<Button 
    android:id="@+id/crtApp" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Create Appointment" 
    android:layout_gravity="center"/> 

createApp.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="vertical" > 

    <TextView 
     android:id="@+id/createAppointment" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_marginBottom="36sp" 
     android:text="Create Appointment" 
     android:textSize="34sp" /> 

    <TextView 
     android:id="@+id/titleOfAppointment" 
     android:layout_width="318dp" 
     android:layout_height="wrap_content" 
     android:text="Title" 
     android:textSize="24sp" /> 

    <EditText 
     android:id="@+id/titleappointment" 
     android:layout_width="295dp" 
     android:layout_height="wrap_content" 
     android:layout_marginBottom="15sp" 
     android:layout_marginLeft="10dp" 
     android:ems="10" /> 

    <TextView 
     android:id="@+id/timeappointment" 
     android:layout_width="318dp" 
     android:layout_height="wrap_content" 
     android:text="Time" 
     android:textSize="24sp" /> 

    <EditText 
     android:id="@+id/timeappointment" 
     android:layout_width="295dp" 
     android:layout_height="wrap_content" 
     android:layout_marginBottom="15sp" 
     android:layout_marginLeft="10dp" 
     android:ems="10" /> 

    <TextView 
     android:id="@+id/detailsappointment" 
     android:layout_width="318dp" 
     android:layout_height="wrap_content" 
     android:text="Details" 
     android:textSize="24sp" /> 
    <EditText 
     android:id="@+id/detailsappointment" 
     android:layout_width="292dp" 
     android:layout_height="wrap_content" 
     android:layout_marginBottom="65dp" 
     android:layout_marginLeft="10dp" 
     android:layout_weight="0.07" 
     /> 

    <Button 
     android:id="@+id/save_button" 
     android:layout_width="105dp" 
     android:layout_height="wrap_content" 
     android:layout_marginLeft="200dp" 
     android:layout_weight="0.01" 
     android:text="Save"/> 

</LinearLayout> 

CreateAppointment.java的按钮

package com.examples; 

import android.app.Activity; 
import android.os.Bundle; 

public class CreateAppointment extends Activity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.createapp); 
    } 

} 

代码，开始一个新的活动

public void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.simple_calendar_view); 
    Button createAppointment = (Button)findViewById(R.id.crtApp); 
    createAppointment.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 

      // TODO Auto-generated method stub 
      startActivity(new Intent("android.intent.action.CREATEAPP"));   
     } 
    }); 
} 

LOG CAT

04-25 15:17:13.719: W/dalvikvm(460): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
04-25 15:17:13.779: E/AndroidRuntime(460): FATAL EXCEPTION: main 
04-25 15:17:13.779: E/AndroidRuntime(460): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.CREATEAPP } 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1408) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.app.Activity.startActivityForResult(Activity.java:2817) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.app.Activity.startActivity(Activity.java:2923) 
04-25 15:17:13.779: E/AndroidRuntime(460): at com.examples.SimpleCalendarViewActivity$1.onClick(SimpleCalendarViewActivity.java:60) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.view.View.performClick(View.java:2408) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.view.View$PerformClick.run(View.java:8816) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.os.Handler.handleCallback(Handler.java:587) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.os.Handler.dispatchMessage(Handler.java:92) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.os.Looper.loop(Looper.java:123) 
04-25 15:17:13.779: E/AndroidRuntime(460): at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-25 15:17:13.779: E/AndroidRuntime(460): at java.lang.reflect.Method.invokeNative(Native Method) 
04-25 15:17:13.779: E/AndroidRuntime(460): at java.lang.reflect.Method.invoke(Method.java:521) 
04-25 15:17:13.779: E/AndroidRuntime(460): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-25 15:17:13.779: E/AndroidRuntime(460): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-25 15:17:13.779: E/AndroidRuntime(460): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

如果我没有理解好了，要在按钮启动活动pressed.Then你应该有这样的事情

：

createAppointment.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
    Intent intent = new Intent(your_context, CreateAppointment.class); 
    startActivity(intent); 
    } 
}); 

希望它能帮助！ （为了更好的理解发表您的错误日志:)）

Answer 2

检查以确保该活动是在AndroidManifest.xml文件。

Answer 3

startActivity(new Intent(getBaseContext(), CreateAppointment.class)); 

而且还像kailoon说的，“检查以确保活动在AndroidManifest.xml文件中。”

Answer 4

你是否在清单文件中声明了活动？

除了尝试：

Intent i = new Intent(); 
i.setClassName(pkgname, activity name); 
startActivity(i); 

Answer 5

<Button />需要有android:onClick="your method name here"属性

和Java代码应该是这个样子

public void methodName(View view) 
{ 
    Intent intent = new Intent(this, ClassName.class); 
    startActivity(intent) 
}