嗨,这是我的自定义视图,我收到空指针异常,当我设置点击监听器。Android在布局上点击监听器
public class PestButtons extends AbsoluteLayout{
private LayoutInflater inflater;
private OnClickListener screenshotOnClickListener = new OnClickListener() {
public void onClick(View v) {
// getContext().startActivity(new Intent(getContext(), ScreenshotActivity.class));
Log.i("a", "a");
}
};
public PestButtons(Context context, AttributeSet attrs) {
super(context, attrs);
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.pestbuttons, this,true);
ImageButton img = (ImageButton) this.findViewById(R.id.reportListBtn);
img.setOnClickListener(screenshotOnClickListener);
}
}
的XML:
<?xml version="1.0" encoding="UTF-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageButton id="@+id/reportListBtn"
android:src="@drawable/reportlist"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="5px"
android:layout_y="20px"
/>
</merge>
我的使用率布局:
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="@+id/main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<com.AgricultureTrading.PestButtons
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<TextView
android:id="@+id/err"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffff0000"
android:layout_x="320px"
android:layout_y="25px"
/>
<TextView
android:id="@+id/weather"
android:layout_width="260px"
android:layout_height="wrap_content"
android:layout_x="140px"
android:layout_y="60px"
/>
<ImageView
android:id="@+id/loaderImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="395px"
android:layout_y="60px"
/>
<Button
android:id="@+id/playBtn"
android:layout_width="93px"
android:layout_height="wrap_content"
android:text="Play sound"
android:layout_x="140px"
android:layout_y="120px"
android:onClick="playBtn_click"
/>
<ImageButton
android:id="@+id/userimage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="150px"
android:layout_y="5px"
android:onClick="changeimage_click"
/>
<TextView
android:id="@+id/weatherLbl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:layout_x="140px"
android:layout_y="96px"
/>
</AbsoluteLayout>
错误日志:
09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime致命异常:主要 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime java.lang.RuntimeE xception:无法启动活动ComponentInfo无法启动活动ComponentInfo {com.AgricultureTrading/com.AgricultureTrading.ProfileActivity}文件行#68:错误膨胀类com.AgricultureTrading.PestButtons 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at android.app.ActivityThread.access $ 500(ActivityThread.java:122) 09:51:农业交易错误AndroidRuntime at android.app.ActivityThread $ H.handleMessage(ActivityTh农业交易ERROR AndroidRuntime at android.os.Handler.dispatchMessage(Handler.java:99) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at android.os。 Looper.loop(Looper.java:132) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at android.app.ActivityThread.main(ActivityThread.java:4123) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at java.lang.reflect.Method.invokeNative(Native Method) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at java.lang.reflect.Method.invoke(Method.java:491) 09:51:56.153 717 com .AgricultureTrading ERROR AndroidRuntime at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:841) 09:51:56.153 717 com.AgricultureTradin g ERROR AndroidRuntime at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at dalvik.system.NativeStart.main(Native Method) 09:51 :56.153 717 com.AgricultureTrading错误AndroidRuntime导致:java.lang.RuntimeException:无法启动活动ComponentInfo {com.AgricultureTrading/com.AgricultureTrading.ProfileActivity}:android.view.InflateException:二进制XML文件行#68:错误膨胀类com.AgricultureTrading.PestButtons 09:51:56.153 717 com.AgricultureTrading在android.app.ActivityThread.startActivityNow(ActivityThread.java:1656)上的错误AndroidRuntime 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime在android.app.LocalActivityManager .moveToState(LocalActivityManager.java:135) 09:51:56.153 717 com.AgricultureTrading ERROR An droidRuntime at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at android.widget.TabHost $ IntentContentStrategy.getContentView(TabHost.java:676) 09:51: 56.153 717 com.AgricultureTrading在Android.widget.TabHost.setCurrentTab(TabHost.java:345) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at android.app.Activity.performCreate(Activity.java:4397) 09:51:56.153 717 com。AgricultureTrading错误AndroidRuntime在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779) 09:51: 56.153 717 com.AgricultureTrading错误AndroidRuntime ... 11更多 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime引起:android.view.InflateException:二进制XML文件行#68:错误膨胀类com.AgricultureTrading.PestButtons 09 :51:56.153 717 com.AgricultureTrading错误AndroidRuntime在android.view.LayoutInflater.createView(LayoutInflater.java:596) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime在android.view.LayoutInflater.createViewFromTag(LayoutInflater.java: 671) 09:51:56.153 717 com.Ag ricultureTrading错误AndroidRuntime在android.view.LayoutInflater.rInflate(LayoutInflater.java:724) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime在android.view.LayoutInflater.inflate(LayoutInflater.java:479) 09:51: 56.153 717 com.AgricultureTrading ERROR AndroidRuntime在android.view.LayoutInflater.inflate(LayoutInflater.java:391) 09:51:56.153在android.view.LayoutInflater.inflate(LayoutInflater.java:347)717 com.AgricultureTrading ERROR AndroidRuntime 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:223) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at android.app.Activity .setContentView(Activity.java:1786) 09:51:56.153 717 com.AgricultureTrading错误AndroidRunti我在com.AgricultureTrading.ProfileActivity.onCreate(ProfileActivity.java:43) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime ... 20更多 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime引起︰java。 lang.reflect.InvocationTargetException 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at java.lang.reflect.Constructor.constructNative(Native Method) 09:51:56.153 717 com.AgricultureTrading ERROR AndroidRuntime at java.lang.reflect。 Constructor.newInstance(Constructor.java:416) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at android.view.LayoutInflater.createView(LayoutInflater.java:576) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime。 .. 31更多 09:51:56.153 717 com.AgricultureTrading错误An droidRuntime引起:java.lang.NullPointerException 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime at com.AgricultureTrading.PestButtons。(PestButtons.java:43) 09:51:56.153 717 com.AgricultureTrading错误AndroidRuntime ... 34多
请提供errormessage的。 – Michele
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