我正在尝试实现用户浏览我的应用程序将图像设置为壁纸的功能。我正在使用通用图像加载器，除了设置壁纸时，一切都很好。我已尝试过Stackoverflow和其他网站的几种不同方法，但没有成功。我最后一次尝试使用此处的解决方案： Android set image as wallpaper
实现之后一切运行正常，直到我选择调用setWall的按钮（setwallbtn）。那时我在我的logcat中遇到了一堆错误（在代码之后，下面发布了完整的logcat错误）。
下面是pageview_item.xml和ImagePagerActivity.java。
任何人都能提供的帮助将不胜感激！
谢谢！
pageview_item.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="1dip" >
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:adjustViewBounds="true"
android:contentDescription="@string/descr_image" />
<ProgressBar
android:id="@+id/loading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone" />
<ImageView
android:id="@+id/setwallbtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center"
android:adjustViewBounds="true"
android:clickable="true"
android:contentDescription="@string/setwall"
android:maxHeight="55dp"
android:onClick="setWall"
android:src="@drawable/setwallpaper" />
</FrameLayout>
imagepageractivity.java
import java.io.IOException;
import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
import com.rwilco12.wallpapergallery.Constants.Extra;
/**
* @original author Sergey Tarasevich (nostra13[at]gmail[dot]com)
*/
public class ImagePagerActivity extends BaseActivity {
private static final String STATE_POSITION = "STATE_POSITION";
DisplayImageOptions options;
ViewPager pager;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pageview);
Bundle bundle = getIntent().getExtras();
String[] imageUrls = bundle.getStringArray(Extra.IMAGES);
int pagerPosition = bundle.getInt(Extra.IMAGE_POSITION, 0);
if (savedInstanceState != null) {
pagerPosition = savedInstanceState.getInt(STATE_POSITION);
}
options = new DisplayImageOptions.Builder()
.showImageForEmptyUri(R.drawable.error)
.showImageOnFail(R.drawable.error)
.resetViewBeforeLoading()
.cacheOnDisc()
.bitmapConfig(Bitmap.Config.RGB_565)
.resetViewBeforeLoading()
.imageScaleType(ImageScaleType.IN_SAMPLE_INT)
.build();
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(new ImagePagerAdapter(imageUrls));
pager.setCurrentItem(pagerPosition);
}
//Begin code from: https://stackoverflow.com/questions/11938182/android-set-image-as-wallpaper
// fetch bitmap from view
public static Bitmap getBitmapFromView(View view) {
Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view
.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(returnedBitmap);
Drawable bgDrawable = view.getBackground();
if (bgDrawable != null)
bgDrawable.draw(canvas);
else
// if we unable to get background drawable then we will set white color as wallpaper
canvas.drawColor(Color.WHITE);
view.draw(canvas);
return returnedBitmap;
}
public void setWall(int i) {
WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
// below line of code will set your current visible pager item to wallpaper
// first we have to fetch bitmap from visible view and then we can pass it to wallpaper
myWallpaperManager.setBitmap(getBitmapFromView(pager.getChildAt(1)));
// below line of code will set input stream data directly to wallpaper
// myWallpaperManager.setStream(InputStream Data);
// below line of code will set any image which is in the drawable folder
// myWallpaperManager.setResource(R.drawable.icon);
} catch (IOException e) {
e.printStackTrace();
}
}
//End code from: https://stackoverflow.com/questions/11938182/android-set-image-as-wallpaper
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(STATE_POSITION, pager.getCurrentItem());
}
private class ImagePagerAdapter extends PagerAdapter {
private String[] images;
private LayoutInflater inflater;
ImagePagerAdapter(String[] images) {
this.images = images;
inflater = getLayoutInflater();
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((View) object);
}
@Override
public void finishUpdate(View container) {
}
@Override
public int getCount() {
return images.length;
}
@Override
public Object instantiateItem(ViewGroup view, int position) {
View imageLayout = inflater.inflate(R.layout.pageview_item, view, false);
ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
imageLoader.displayImage(images[position], imageView, options, new SimpleImageLoadingListener() {
@Override
public void onLoadingStarted(String imageUri, View view) {
spinner.setVisibility(View.VISIBLE);
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
String message = null;
switch (failReason.getType()) {
case IO_ERROR:
message = "Input/Output error";
break;
case DECODING_ERROR:
message = "Image can't be decoded";
break;
case NETWORK_DENIED:
message = "Downloads are denied";
break;
case OUT_OF_MEMORY:
message = "Out Of Memory error";
break;
case UNKNOWN:
message = "Unknown error";
break;
}
Toast.makeText(ImagePagerActivity.this, message, Toast.LENGTH_SHORT).show();
spinner.setVisibility(View.GONE);
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
spinner.setVisibility(View.GONE);
}
});
((ViewPager) view).addView(imageLayout, 0);
return imageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View container) {
}
}
logcat错误
09-28 10:01:36.334: W/dalvikvm(26948): threadid=1: thread exiting with uncaught exception (group=0x420772a0)
09-28 10:01:36.334: E/AndroidRuntime(26948): FATAL EXCEPTION: main
09-28 10:01:36.334: E/AndroidRuntime(26948): java.lang.IllegalStateException: Could not find a method setWall(View) in the activity class com.rwilco12.wallpapergallery.ImagePagerActivity for onClick handler on view class android.widget.ImageView with id 'setwallbtn'
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.view.View$1.onClick(View.java:3686)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.view.View.performClick(View.java:4223)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.view.View$PerformClick.run(View.java:17281)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.os.Handler.handleCallback(Handler.java:615)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.os.Handler.dispatchMessage(Handler.java:92)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.os.Looper.loop(Looper.java:137)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.app.ActivityThread.main(ActivityThread.java:4898)
09-28 10:01:36.334: E/AndroidRuntime(26948): at java.lang.reflect.Method.invokeNative(Native Method)
09-28 10:01:36.334: E/AndroidRuntime(26948): at java.lang.reflect.Method.invoke(Method.java:511)
09-28 10:01:36.334: E/AndroidRuntime(26948): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
09-28 10:01:36.334: E/AndroidRuntime(26948): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
09-28 10:01:36.334: E/AndroidRuntime(26948): at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:106)
09-28 10:01:36.334: E/AndroidRuntime(26948): at dalvik.system.NativeStart.main(Native Method)
09-28 10:01:36.334: E/AndroidRuntime(26948): Caused by: java.lang.NoSuchMethodException: setWall [class android.view.View]
09-28 10:01:36.334: E/AndroidRuntime(26948): at java.lang.Class.getConstructorOrMethod(Class.java:460)
09-28 10:01:36.334: E/AndroidRuntime(26948): at java.lang.Class.getMethod(Class.java:915)
09-28 10:01:36.334: E/AndroidRuntime(26948): at android.view.View$1.onClick(View.java:3679)
09-28 10:01:36.334: E/AndroidRuntime(26948): ... 12 more
答案 0 :(得分：0)
尝试设置onclick以匹配lolcat想要的内容
类似的东西：
public void setWall(View v) {
WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
// below line of code will set your current visible pager item to wallpaper
// first we have to fetch bitmap from visible view and then we can pass it to wallpaper
myWallpaperManager.setBitmap(getBitmapFromView(v));
} catch (IOException e) {
e.printStackTrace();
}
}