因此,我爲我的應用程序製作了查看傳呼機,但是我遇到了一個小問題。我無法弄清楚如何從我正在查看的圖像中獲取ID。我的資源位於資產文件夾中。是否有可能獲得圖像的ID,並將該圖像設置爲壁紙?獲取查看傳呼機上顯示的圖像的當前ID
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();
}
});
}
}
你可以使用viewPagerIndicator也爲此 – jyomin