我已经使用手册 http://developer.android.com/guide/topics/media/camera.html 但我有它的问题。这code保存图像的两倍。第一张照片被保存在/ SD卡/ DCIM /摄像机和第二张照片保存在/ SD卡/ PicturesMyCameraApp。我怎样才能删除第一个保存在/ SD卡/ DCIM /摄像机。 感谢您的帮助
公共无效的onClick(视图v){
// TODO自动生成方法存根
开关(v.getId()){
案例R.id.imageButton1:
意图I =新的意图(MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT,getOutputMediaFileUri());
startActivityForResult(我,CAPTURE_IMAGE_ACTIVITY_REQUEST_ code);
打破;
}
}
@覆盖
公共布尔onCreateOptionsMenu(功能菜单){
MenuInflater充气= getMenuInflater();
inflater.inflate(R.menu.mainmenu,菜单);
返回true;
}
@覆盖
公共布尔onOptionsItemSelected(菜单项项){
开关(item.getItemId()){
案例R.id.item1:
/ *意向意图=新的意图(ZodiacActivity.this,AboutActivity.class);
startActivity(意向); * /
打破;
案例R.id.item2:
this.moveTaskToBack(真正的);
打破;
}
返回true;
}
@覆盖
保护无效onActivityResult(INT申请code,INT结果code,意图数据){
super.onActivityResult(要求code,因此code,数据);
如果(要求code == CAPTURE_IMAGE_ACTIVITY_REQUEST_ code){
如果(结果code == RESULT_OK){
Toast.makeText(这一点,Uloženo做:+ getOutputMediaFileUri()的toString(),Toast.LENGTH_LONG).show();
}
其他 {
返回;
}
}
}
公共乌里getOutputMediaFileUri(){
返回Uri.fromFile(getOutputMediaFile());
}
公共文件getOutputMediaFile(){
//为了安全起见,你应该检查SD卡安装
//在此之前使用Environment.getExternalStorageState()。
文件mediaStorageDir =新的文件(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),MyCameraApp);
//这个位置效果最好,如果你希望共享的创建的图像
//应用程序之间,坚持后,您的应用程序已被卸载。
//创建存储目录,如果它不存在
如果(!mediaStorageDir.exists()){
如果(!mediaStorageDir.mkdirs()){
Log.d(MyCameraApp,无法创建目录);
返回null;
}
}
//创建一个媒体文件名
字符串的timeStamp =新的SimpleDateFormat(YYYYMMDD_HHMMSS)格式(新的Date())。
文件媒体文件;
媒体文件=新的文件(mediaStorageDir.getPath()+文件分割符+IMG_+的timeStamp +.JPG);
返回媒体文件;
}
解决方案
您可以简单地删除文件:
字符串pathToFile =/sdcard/DCIM/Camera/imagename.jpg;
布尔成功=新的文件(pathToFile).delete();
如果(成功){
//删除文件成功
}其他{
//没有成功
}
获取最新拍摄的照片中/ SD卡/ DCIM /摄像头:
文件[]的图像=新的文件(/ SD卡/ DCIM /摄像机)listFiles()。
文件latestSavedImage =图像[0];
的for(int i = 1; I< images.length ++我){
如果(图像[I] .lastModified()> latestSavedImage.lastModified()){
latestSavedImage =图像;
}
}
请注意,在code未测试!
I have used manual on http://developer.android.com/guide/topics/media/camera.html but I have a problem with it. This code save image twice. First picture is saved in /sdcard/DCIM/Camera and the second picture is saved in /sdcard/PicturesMyCameraApp. How can I remove the first saving to /sdcard/DCIM/Camera. Thanks for help
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.imageButton1:
Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, getOutputMediaFileUri());
startActivityForResult(i, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.mainmenu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()) {
case R.id.item1:
/*Intent intent = new Intent(ZodiacActivity.this, AboutActivity.class);
startActivity(intent);*/
break;
case R.id.item2:
this.moveTaskToBack(true);
break;
}
return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode==RESULT_OK) {
Toast.makeText(this, "Uloženo do: " + getOutputMediaFileUri().toString(), Toast.LENGTH_LONG).show();
}
else {
return;
}
}
}
public Uri getOutputMediaFileUri(){
return Uri.fromFile(getOutputMediaFile());
}
public File getOutputMediaFile(){
// To be safe, you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this.
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyCameraApp");
// This location works best if you want the created images to be shared
// between applications and persist after your app has been uninstalled.
// Create the storage directory if it does not exist
if (! mediaStorageDir.exists()){
if (! mediaStorageDir.mkdirs()){
Log.d("MyCameraApp", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
解决方案
You can simply delete the file:
String pathToFile = "/sdcard/DCIM/Camera/imagename.jpg";
boolean success = new File(pathToFile).delete();
if(success){
// deleting file succeeded
}else{
// it didn't succeed
}
Get the latest taken picture in /sdcard/DCIM/Camera:
File[] images = new File("/sdcard/DCIM/Camera").listFiles();
File latestSavedImage = images[0];
for(int i=1; i<images.length; ++i){
if(images[i].lastModified() > latestSavedImage.lastModified()){
latestSavedImage = image;
}
}
Note, the code was not tested!