获取图像的电流id被显示在寻呼机查看

问题描述

所以我做了寻呼机查看我的应用程序，但我有一个小问题。我无法弄清楚如何从我观看图像的同时获得ID。我ressources是资产的文件夹。是否有可能获得形象标识，并设置图片作为壁纸？

So I made view pager for my app, but I have a small problem. I can't figure out how to get ID from the image I am viewing. My ressources are in Assets Folder. Is it possible to get ID of image, and set that image as wallpaper?

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();

    }
});

}

}

推荐答案

而不是setResource请使用setBitmap或setStream

instead of setResource use either setBitmap or setStream

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