我已经被这个愚弄了好几天,但无法让它工作,尽管它编译没有错误,并且 apk 安装在模拟器中。模拟器显示位图(res/drawable/scr0.png)正常,但没有按钮显示,点击时也没有响应。
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
//public class PageOne extends Activity implements View.OnClickListener {
public class PageOne extends Activity {
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_page_one);
setContentView(new myView(this));
//addListenerOnButton();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.page_one, menu);
return true;
}
private class myView extends View {
public myView (Context context) {
super (context);
//setContentView(R.layout.activity_page_one);
addListenerOnButton();
//button.bringToFront();
}
@Override
protected void onDraw (Canvas canvas) {
this.setBackgroundResource(R.drawable.scr0);
button.bringToFront();
}
}// myView
public void addListenerOnButton() {
final Context context = this;
button = (Button) findViewById(R.id.button1);
//button.setBackgroundColor(Color.TRANSPARENT);
button.bringToFront();
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(context, PageTwo.class);
startActivity(intent);
}
});
}// addListenerOnButton()
}// PageOne
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".PageOne" >
<Button
android:id="@+id/button1"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="42dp"
android:text="bubkiss" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.yetanotherpageturner"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.yetanotherpageturner.PageOne"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.yetanotherpageturner.PageTwo"
android:label="@string/app_name"
</activity>
</application>
</manifest>