所以我为我的应用程序制作了视图寻呼机,但我遇到了一个小问题。我无法弄清楚如何从我正在查看的图像中获取ID。我的资源在资产文件夹中。是否可以获取图像的ID,并将该图像设置为壁纸?
public class MainActivity extends Activity {
private GalleryViewPager mViewPager;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String[] urls = null;
List<String> items = new ArrayList<String>();
try {
urls = getAssets().list("");
for (String filename : urls)
{
if (filename.matches(".+\\.jpg"))
{
String path = getFilesDir() + "/" + filename;
copy(getAssets().open(filename), new File(path) );
items.add(path);
}
}
} catch (IOException e) {
e.printStackTrace();
}
FilePagerAdapter pagerAdapter = new FilePagerAdapter(this, items);
pagerAdapter.setOnItemChangeListener(new OnItemChangeListener()
{
@Override
public void onItemChange(int currentPosition)
{
Toast.makeText(MainActivity.this, "Current item is " + currentPosition, Toast.LENGTH_SHORT).show();
}
});
mViewPager = (GalleryViewPager)findViewById(R.id.viewer);
mViewPager.setOffscreenPageLimit(3);
mViewPager.setAdapter(pagerAdapter);
}
public void copy( final InputStream in, File dst) throws IOException {
OutputStream out = new FileOutputStream(dst);
// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
out.close();
Button buttonSetWallpaper = (Button)findViewById(R.id.setwallpaper);
buttonSetWallpaper.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
WallpaperManager myWallpaperManager
= WallpaperManager.getInstance(getApplicationContext());
try {
InputStream In = getAssets().open("2.jpg");
myWallpaperManager.setStream(In);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Toast.makeText(getBaseContext(), "changed+", Toast.LENGTH_SHORT).show();
}
});
}
}
答案 0 :(得分:1)
使用此:
myWallpaperManager.setResource(imageArray[curruntPosition]);
而不是
myWallpaperManager.setResource(R.drawable.ic_launcher);
答案 1 :(得分:1)
而不是setResource使用setBitmap或setStream