Android 获取文件的缩略图
fileitem 是个工具类保存文件的一些属性如名字,地址等
new AsyncLoadVideo().execute(fileItem); //视频其他类似
//视频
class AsyncLoadVideo extends AsyncTask
@Override
protected Object doInBackground(FileItem... params) {
String path = MediaContainerApplication.CACHE_PATH;
Bitmap bitmap;
Bitmap newBitmap;
FileItem item = params[0];
File thumbFile = new File(path + item.getFileName().replace(".", ""));
if (thumbFile.exists()) {
newBitmap = BitmapFactory.decodeFile(thumbFile.getAbsolutePath());
item.setIcon(newBitmap);
publishProgress();
}
else {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 14;
bitmap = ThumbnailUtils.createVideoThumbnail(item.getFilePath(), MediaStore.Video.Thumbnails.MINI_KIND);
newBitmap = ThumbnailUtils.extractThumbnail(bitmap, 64,64);
if(bitmap != null && !bitmap.isRecycled()){
bitmap = null;
}
if (newBitmap != null) {
item.setIcon(newBitmap);
thumbFile.createNewFile();
OutputStream out = new FileOutputStream(thumbFile);
newBitmap.compress(CompressFormat.JPEG, 26, out);
publishProgress();
Thread.sleep(200);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
return null;
}
@Override
public void onProgressUpdate(Void... value) {
FilesAdapter.this.notifyDataSetChanged();
}
}
//图片
class AsyncLoadImage extends AsyncTask@Override
protected Object doInBackground(FileItem... params) {
Bitmap bitmap;
Bitmap newBitmap;
FileItem item = params[0];
File thumbFile = new File(path + item.getFileName().replace(".", ""));
if (thumbFile.exists()) {
newBitmap = BitmapFactory.decodeFile(thumbFile.getAbsolutePath());
item.setIcon(newBitmap);
publishProgress();
}
else {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 14;
bitmap = BitmapFactory.decodeFile(item.getFilePath(), options);
newBitmap = ThumbnailUtils.extractThumbnail(bitmap, 64,64);
if(bitmap != null && !bitmap.isRecycled()){
bitmap = null;
// bitmap.recycle();
}
if (newBitmap != null) {
item.setIcon(newBitmap);
thumbFile.createNewFile();
OutputStream out = new FileOutputStream(thumbFile);
newBitmap.compress(CompressFormat.JPEG, 26, out);
publishProgress();
Thread.sleep(200);
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
@Override
public void onProgressUpdate(Void... value) {
FilesAdapter.this.notifyDataSetChanged();
}
@Override
protected void onPostExecute(Object result) {
}
}
//apk文件
class AsyncLoadApkicon extends AsyncTask@Override
protected Object doInBackground(FileItem... params) {
Bitmap bm;
FileItem item = params[0];
File thumbFile = new File(path + item.getFileName().replace(".", ""));
if (thumbFile.exists()) {
bm = BitmapFactory.decodeFile(thumbFile.getAbsolutePath());
item.setIcon(bm);
publishProgress();
}
else {
try {
Drawable dw = Helper.showUninstallAPKIcon(mContext, item.getFilePath());
if(dw!=null){
BitmapDrawable bd = (BitmapDrawable)dw;
bm = bd.getBitmap();
item.setIcon(bm);
publishProgress();
Thread.sleep(200);
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
@Override
public void onProgressUpdate(Void... value) {
FilesAdapter.this.notifyDataSetChanged();
}
@Override
protected void onPostExecute(Object result) {
}
}
////////////////////////////////////////////
/**
* 用来得到没有安装上的应用程序的icon
*/
public static Drawable showUninstallAPKIcon(Context context, String apkPath) {
PackageManager pm = context.getPackageManager();
PackageInfo info = pm.getPackageArchiveInfo(apkPath,
PackageManager.GET_ACTIVITIES);
if (info != null) {
ApplicationInfo appInfo = info.applicationInfo;
appInfo.sourceDir = apkPath; //设置资源路径，本地包的完整路径。
appInfo.publicSourceDir = apkPath; //公用信息的路径。
try {
return appInfo.loadIcon(pm);
} catch (OutOfMemoryError e) {
Log.e("ApkIconLoader", e.toString());
}
}
return null;
}
}