我试图在点击按钮后加载第二个布局但由于某种原因应用程序不断崩溃...我很确定我做的一切都正确 - 但是每次我都失败了点击屏幕底部的保存按钮。
P.S。
如果需要更多信息，请告诉我。我很乐意提供它。
package com.example.linkingmanager;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.content.Intent;
public class App2Activity extends Activity {
Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
}
public void saveButtonClicked(View v) {
// do stuff
super.onCreate(savedInstanceState);
Intent intent = new Intent(App2Activity.this, AppActivity.class);
App2Activity.this.startActivity(intent);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:orientation="vertical" android:id="@+id/linearLayout1" android:layout_width="fill_parent" android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView android:textAppearance="?android:textAppearanceLarge" android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="User Settings:" />
<TextView android:textAppearance="?android:textAppearanceMedium" android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Data Limit" />
<SeekBar android:id="@+id/seekBar1" android:layout_width="fill_parent" android:layout_height="wrap_content" />
<LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content">
<TextView android:gravity="left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="10MB" android:layout_weight="1.0" />
<TextView android:gravity="right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Unlimited Data" android:layout_weight="1.0" />
</LinearLayout>
<TextView android:textAppearance="?android:textAppearanceMedium" android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Bandwidth Limit" />
<SeekBar android:id="@+id/seekBar1" android:layout_width="fill_parent" android:layout_height="wrap_content" />
<LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content">
<TextView android:gravity="left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="10kbs" android:layout_weight="1.0" />
<TextView android:gravity="right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Unlimited Bandwidth" android:layout_weight="1.0" />
</LinearLayout>
<TextView android:textAppearance="?android:textAppearanceSmall" android:id="@+id/TextView01" android:layout_width="wrap_content" android:layout_height="wrap_content" />
<TextView android:textAppearance="?android:textAppearanceMedium" android:id="@+id/TextView02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="WiFi Time Limit" />
<TimePicker android:id="@+id/timePicker1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="50.0dip" android:layout_weight="1.0" />
<EditText android:id="@+id/editText1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="Blocked Sites - [ex: www.xxx.com]" android:ems="10" />
<Button android:id="@+id/saveButton" android:onClick="saveButtonClicked" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Save" />
</LinearLayout>
03-04 07:35:41.939: D/dalvikvm(944): GC_FOR_ALLOC freed 40K, 7% free 2456K/2640K, paused 46ms, total 49ms
03-04 07:35:41.989: I/dalvikvm-heap(944): Grow heap (frag case) to 5.831MB for 3456016-byte allocation
03-04 07:35:42.049: D/dalvikvm(944): GC_FOR_ALLOC freed 2K, 4% free 5828K/6016K, paused 58ms, total 59ms
03-04 07:35:42.139: D/dalvikvm(944): GC_CONCURRENT freed <1K, 4% free 5828K/6016K, paused 8ms+16ms, total 90ms
03-04 07:35:42.799: D/libEGL(944): loaded /system/lib/egl/libEGL_emulation.so
03-04 07:35:42.878: D/(944): HostConnection::get() New Host Connection established 0x2a155228, tid 944
03-04 07:35:42.959: D/libEGL(944): loaded /system/lib/egl/libGLESv1_CM_emulation.so
03-04 07:35:42.979: D/libEGL(944): loaded /system/lib/egl/libGLESv2_emulation.so
03-04 07:35:43.099: W/EGL_emulation(944): eglSurfaceAttrib not implemented
03-04 07:35:43.119: D/OpenGLRenderer(944): Enabling debug mode 0
03-04 07:35:47.248: W/EGL_emulation(944): eglSurfaceAttrib not implemented
03-04 07:35:55.629: D/AndroidRuntime(944): Shutting down VM
03-04 07:35:55.671: W/dalvikvm(944): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
03-04 07:35:55.709: E/AndroidRuntime(944): FATAL EXCEPTION: main
03-04 07:35:55.709: E/AndroidRuntime(944): java.lang.IllegalStateException: Could not find a method saveButtonClicked(View) in the activity class com.example.linkingmanager.App2Activity for onClick handler on view class android.widget.Button with id 'saveButton'
03-04 07:35:55.709: E/AndroidRuntime(944): at android.view.View$1.onClick(View.java:3586)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.view.View.performClick(View.java:4204)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.view.View$PerformClick.run(View.java:17355)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.os.Handler.handleCallback(Handler.java:725)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.os.Handler.dispatchMessage(Handler.java:92)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.os.Looper.loop(Looper.java:137)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.app.ActivityThread.main(ActivityThread.java:5041)
03-04 07:35:55.709: E/AndroidRuntime(944): at java.lang.reflect.Method.invokeNative(Native Method)
03-04 07:35:55.709: E/AndroidRuntime(944): at java.lang.reflect.Method.invoke(Method.java:511)
03-04 07:35:55.709: E/AndroidRuntime(944): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-04 07:35:55.709: E/AndroidRuntime(944): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-04 07:35:55.709: E/AndroidRuntime(944): at dalvik.system.NativeStart.main(Native Method)
03-04 07:35:55.709: E/AndroidRuntime(944): Caused by: java.lang.NoSuchMethodException: saveButtonClicked [class android.view.View]
03-04 07:35:55.709: E/AndroidRuntime(944): at java.lang.Class.getConstructorOrMethod(Class.java:460)
03-04 07:35:55.709: E/AndroidRuntime(944): at java.lang.Class.getMethod(Class.java:915)
03-04 07:35:55.709: E/AndroidRuntime(944): at android.view.View$1.onClick(View.java:3579)
03-04 07:35:55.709: E/AndroidRuntime(944): ... 11 more
03-04 07:35:58.489: I/Process(944): Sending signal. PID: 944 SIG: 9
答案 0 :(得分：0)
删除此行：
super.onCreate(savedInstanceState);
来自您的方法：
public void saveButtonClicked(View v)
由于
答案 1 :(得分：0)
您似乎只显示了xml的一部分。具有单击侦听器声明的按钮在哪里？我的猜测 - xml和代码中方法的名称是不同的。
顺便说一句，不要在onCreate（）之外的其他地方调用super.onCreate（Bundle）。
答案 2 :(得分：0)
另一种方法是在您的活动中声明您的按钮，然后调用onClickListner。
button = (Button)findViewById(R.id.saveButton);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(App2Activity.this,AppActivity.class);
App2Activity.this.startActivity(intent);
}
});
并从xml中删除android:onClick="saveButtonClicked"
另外采用Prateek Sharma给出的解决方案
答案 3 :(得分：0)
试试这个
public class App2Activity extends Activity {
Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
button = (Button) findViewById(R.id.saveButton)
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(App2Activity.this, AppActivity.class);
startActivity(intent);
}
});
}
}
这样做会容易得多。