这个想法是你可以水平滚动图像，如果你点击一个，它会在按钮上方显示放大，如果你按下按钮，它会将图像设置为墙纸。但是我的应用程序在运行时崩溃：
这是xml代码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/IVDisplay"
android:layout_width="wrap_content"
android:layout_height="220dp"
android:layout_marginBottom="15dp"
android:layout_marginTop="15dp"
android:contentDescription="@string/button3_set"
android:padding="10dp"
android:src="@drawable/back_1" />
<Button
android:id="@+id/bSetBG"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="22dp"
android:text="@string/button3_set" />
<HorizontalScrollView
android:id="@+id/gallery1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp"
android:layout_marginBottom="10dp"
android:scrollbarFadeDuration="200"
android:scrollbarStyle="outsideOverlay"
android:layout_gravity="center" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="@+id/Vimage1"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_1" />
<ImageView
android:id="@+id/Vimage2"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_2" />
<ImageView
android:id="@+id/Vimage3"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_3" />
<ImageView
android:id="@+id/Vimage4"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_4" />
<ImageView
android:id="@+id/Vimage5"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_5" />
<ImageView
android:id="@+id/Vimage6"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_6" />
<ImageView
android:id="@+id/Vimage7"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_7" />
<ImageView
android:id="@+id/Vimage8"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_8" />
<ImageView
android:id="@+id/Vimage9"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_9" />
<ImageView
android:id="@+id/Vimage10"
android:layout_width="wrap_content"
android:layout_height="153dp"
android:contentDescription="@string/button3_imgprev"
android:padding="10dp"
android:src="@drawable/back_wallpaper" />
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
和java：
package com.example.st;
import java.io.IOException;
import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class Button3 extends Activity implements View.OnClickListener {
ImageView display;
int toPhone;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.button_3);
display = (ImageView) findViewById(R.id.IVDisplay);
ImageView image1 = (ImageView) findViewById(R.id.Vimage1);
ImageView image2 = (ImageView) findViewById(R.id.Vimage2);
ImageView image3 = (ImageView) findViewById(R.id.Vimage3);
ImageView image4 = (ImageView) findViewById(R.id.Vimage4);
ImageView image5 = (ImageView) findViewById(R.id.Vimage5);
ImageView image6 = (ImageView) findViewById(R.id.Vimage6);
ImageView image7 = (ImageView) findViewById(R.id.Vimage7);
ImageView image8 = (ImageView) findViewById(R.id.Vimage8);
ImageView image9 = (ImageView) findViewById(R.id.Vimage9);
ImageView image10 = (ImageView) findViewById(R.id.Vimage10);
Button setWall = (Button) findViewById(R.id.bSetBG);
toPhone = R.drawable.back_1;
image1.setOnClickListener(this);
image2.setOnClickListener(this);
image3.setOnClickListener(this);
image4.setOnClickListener(this);
image5.setOnClickListener(this);
image6.setOnClickListener(this);
image7.setOnClickListener(this);
image8.setOnClickListener(this);
image9.setOnClickListener(this);
image10.setOnClickListener(this);
setWall.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.Vimage1:
display.setImageResource(R.drawable.back_1);
toPhone = R.drawable.back_1;
break;
case R.id.Vimage2:
display.setImageResource(R.drawable.back_2);
toPhone = R.drawable.back_2;
break;
case R.id.Vimage3:
display.setImageResource(R.drawable.back_3);
toPhone = R.drawable.back_3;
break;
case R.id.Vimage4:
display.setImageResource(R.drawable.back_4);
toPhone = R.drawable.back_4;
break;
case R.id.Vimage5:
display.setImageResource(R.drawable.back_5);
toPhone = R.drawable.back_5;
break;
case R.id.Vimage6:
display.setImageResource(R.drawable.back_6);
toPhone = R.drawable.back_6;
break;
case R.id.Vimage7:
display.setImageResource(R.drawable.back_7);
toPhone = R.drawable.back_7;
break;
case R.id.Vimage8:
display.setImageResource(R.drawable.back_8);
toPhone = R.drawable.back_8;
break;
case R.id.Vimage9:
display.setImageResource(R.drawable.back_9);
toPhone = R.drawable.back_9;
break;
case R.id.Vimage10:
display.setImageResource(R.drawable.back_wallpaper);
toPhone = R.drawable.back_wallpaper;
break;
case R.id.bSetBG:
WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
Bitmap whatever = BitmapFactory.decodeStream(getResources()
.openRawResource(toPhone));
try {
myWallpaperManager.setBitmap(whatever);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(Button3.this,
"Ooops, couldn't set the wallpaper",
Toast.LENGTH_SHORT).show();
}
}
}
}
以下是 LogCat 显示的错误：
- 07-24 00:53:44.524: E/AndroidRuntime(4663): FATAL EXCEPTION: main
- 07-24 00:53:44.524: E/AndroidRuntime(4663): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.st/com.example.st.Button3}: android.view.InflateException: Binary XML file line #56: Error inflating class <unknown>
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.ActivityThread.access$600(ActivityThread.java:141)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.os.Handler.dispatchMessage(Handler.java:99)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.os.Looper.loop(Looper.java:137)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.ActivityThread.main(ActivityThread.java:5041)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at java.lang.reflect.Method.invokeNative(Native Method)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at java.lang.reflect.Method.invoke(Method.java:511)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at dalvik.system.NativeStart.main(Native Method)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): Caused by: android.view.InflateException: Binary XML file line #56: Error inflating class <unknown>
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.createView(LayoutInflater.java:613)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:660)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.rInflate(LayoutInflater.java:749)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.rInflate(LayoutInflater.java:749)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.Activity.setContentView(Activity.java:1881)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at com.example.st.Button3.onCreate(Button3.java:24)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.Activity.performCreate(Activity.java:5104)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): ... 11 more
- 07-24 00:53:44.524: E/AndroidRuntime(4663): Caused by: java.lang.reflect.InvocationTargetException
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at java.lang.reflect.Constructor.constructNative(Native Method)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.view.LayoutInflater.createView(LayoutInflater.java:587)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): ... 26 more
- 07-24 00:53:44.524: E/AndroidRuntime(4663): Caused by: java.lang.OutOfMemoryError
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:501)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:354)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:785)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.content.res.Resources.loadDrawable(Resources.java:1965)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.widget.ImageView.<init>(ImageView.java:120)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): at android.widget.ImageView.<init>(ImageView.java:110)
- 07-24 00:53:44.524: E/AndroidRuntime(4663): ... 29 more