Android 按按钮启动新的活动按钮
我想在按下“createAppointment”按钮时启动一个新活动,但到目前为止,当我单击该按钮时,应用程序崩溃 按钮的创建:Android 按按钮启动新的活动按钮,android,Android,我想在按下“createAppointment”按钮时启动一个新活动,但到目前为止,当我单击该按钮时,应用程序崩溃 按钮的创建: <Button android:id="@+id/crtApp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Create Appointment" android:layout_gravity=
<Button
android:id="@+id/crtApp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Create Appointment"
android:layout_gravity="center"/>
用于启动新活动的按钮的代码
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"));
}
});
}
原木猫
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)
检查以确保活动位于AndroidManifest.xml文件中
startActivity(new Intent(getBaseContext(), CreateAppointment.class));
正如kailoon所说,“检查以确保活动位于AndroidManifest.xml文件中。”您是否在menifest文件中声明了活动 除了尝试:
Intent i = new Intent();
i.setClassName(pkgname, activity name);
startActivity(i);
如果我理解的很好,您希望在按下按钮时开始一项活动。然后您应该有如下内容:
createAppointment.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(your_context, CreateAppointment.class);
startActivity(intent);
}
});
希望有帮助!
(为了更好地理解错误日志:)
需要有android:onClick=“此处的方法名”
属性
Java代码应该是这样的
public void methodName(View view)
{
Intent intent = new Intent(this, ClassName.class);
startActivity(intent)
}
发布您收到的logcat错误。我已在Android manifest.xml中添加了活动,我将进行编辑以发布logcat您所说的“您的上下文”是什么意思您应该在活动中包含此内容否?然后将您的上下文替换为。this(我应该说您的活动而不是您的上下文),因此您的意思是(Intent Intent=new Intent(this,CreateAppointment.class);?您想说什么活动?public Intent(context packageContext,class cls)参数:packageContext实现该类的应用程序包的上下文。cls用于该目的的组件类。感谢mate!!!!!跳起来!!!!!当它工作时!!!!!Looool顺便问一下getBaseContext()是什么意思?getBaseContext()返回上下文,您也可以使用Activity.this。但是在使用新的Intent(this,Lala.class)时要小心,因为在您的情况下,“this”将引用OnClick而不是您的活动
createAppointment.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(your_context, CreateAppointment.class);
startActivity(intent);
}
});
public void methodName(View view)
{
Intent intent = new Intent(this, ClassName.class);
startActivity(intent)
}