Android 无法将图片添加到新文件夹
将图片添加到新文件夹时遇到问题。由于某些原因,当我的手机连接到电脑并用作模拟器时,图片确实会保存到正确的文件夹中。但一旦我断开手机与电脑的连接,它就不会将图片保存到文件夹中。我已包括以下权限:Android 无法将图片添加到新文件夹,android,Android,将图片添加到新文件夹时遇到问题。由于某些原因,当我的手机连接到电脑并用作模拟器时,图片确实会保存到正确的文件夹中。但一旦我断开手机与电脑的连接,它就不会将图片保存到文件夹中。我已包括以下权限: <uses-permission android:name="android.permission.SET_WALLPAPER" /> <uses-permission android:name="android.permission.CAMERA"/> <uses-perm
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
我的密码是贝娄
public class Camera extends Activity implements View.OnClickListener{
Intent i;
ImageView iv;
ImageButton ib;
Button b;
final static int cameraData = 0;
Bitmap bmp;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
initialize();
InputStream is = getResources().openRawResource(R.drawable.ic_launcher);
bmp= BitmapFactory.decodeStream(is);
}
private void initialize() {
// TODO Auto-generated method stub
iv =(ImageView) findViewById(R.id.ivReturnPic);
ib = (ImageButton) findViewById(R.id.ibTakePic);
b = (Button)findViewById(R.id.bSetWall);
b.setOnClickListener(this);
ib.setOnClickListener(this);
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.bSetWall:
try {
getApplicationContext().setWallpaper(bmp);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
case R.id.ibTakePic:
int imageNum = 0;
Intent imageIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File imagesFolder = new File(Environment.getExternalStorageDirectory(), "BeautifulPlaces");
imagesFolder.mkdirs(); // <----
String fileName = "image_" + String.valueOf(imageNum) + ".jpg";
File output = new File(imagesFolder, fileName);
while (output.exists()){
imageNum++;
fileName = "image_" + String.valueOf(imageNum) + ".jpg";
output = new File(imagesFolder, fileName);
}
Uri uriSavedImage = Uri.fromFile(output);
imageIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage);
startActivityForResult(imageIntent, 0);
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
bmp = (Bitmap) extras.get("data");
iv.setImageBitmap(bmp);
}
}
}
公共类摄影机扩展活动实现View.OnClickListener{
意图一;
ImageView iv;
图像按钮ib;
按钮b;
最终静态int cameraData=0;
位图bmp;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
//TODO自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
初始化();
InputStream is=getResources().openRawResource(R.drawable.ic_启动器);
bmp=位图工厂.decodeStream(is);
}
私有void初始化(){
//TODO自动生成的方法存根
iv=(ImageView)findViewById(R.id.ivReturnPic);
ib=(ImageButton)findViewById(R.id.ibTakePic);
b=(按钮)findViewById(R.id.bSetWall);
b、 setOnClickListener(此);
ib.setOnClickListener(本);
}
公共void onClick(视图v){
//TODO自动生成的方法存根
开关(v.getId()){
案例R.id.B网球:
试一试{
getApplicationContext().setWallpaper(bmp);
}捕获(IOE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
打破
案例R.id.ibTakePic:
int imageNum=0;
Intent-imageIntent=newintent(android.provider.MediaStore.ACTION\u-IMAGE\u-CAPTURE);
File imagesFolder=新文件(Environment.getExternalStorageDirectory(),“BeautifulPlaces”);
imagesFolder.mkdirs();//在将数据写入外部存储器之前,必须先检查它,因为它可能不可用
您可以参考此文档:()
我添加了检查,以确保外部存储可用。再次建议,该程序在手机连接到计算机时工作,但在断开连接时不工作。我是否缺少权限???因为它在连接到计算机时工作很奇怪,还是因为应用程序未签名但仍在运行,所以应该如此。我我认为您应该在onActivityResult中执行保存过程,因为在相机活动完成之前,图像数据不会传回。
String extStorageState = Environment.getExternalStorageState();
if (extStorageState.equalsIgnoreCase(Environment.MEDIA_MOUNTED)) {
// For ensure there is no problem, I usually do one more checking here
File externalDir = Environment.getExternalStorageDirectory();
if (externalDir.canWrite()) {
// Do you job here
// ...
}
}