我如何...将图像从imagview存储到SD卡。按一下按钮 [英] How do I...Store Image from imagview To sd card.on a button click

问题描述

嗨


好​​中午给所有人



我正在开发一个应用程序，它将在图像视图上显示图像。< br $> b $ b

我需要：



我需要的是当我点击按钮然后它应该存储图像存在于SD卡（模拟器）的图像视图中。



以下是我使用的方式:(但没有预期结果）

按钮btnWriteSDFile =（按钮）findViewById（R.id.btnWriteSDFile）; 
 btnWriteSDFile.setOnClickListener（new OnClickListener（）{
 public void onClick（View v）{
 
 ImageView myImage =（ImageView）findViewById（R.id.imageView1）; 
 BitmapDrawable drawable =（BitmapDrawable）myImage.getDrawable（）; 
 Bitmap bitmap = drawable.getBitmap（）; 
 File sdCardDirectory = Environment.getExternalStorageDirectory（）; 
 File image = new File（ sdCardDirectory，image.png）; 
 boolean success = false; 
 
 //将文件编码为PNG图像。
 FileOutputStream outStream; 
 try {
 
 outStream = new FileOutputStream（image）; 
 bitmap.compress（Bitmap.CompressFormat.PNG，100，outStream）; 
 
 
 outStream.flush（ ）; 
 outStream.close（）; 
 success = true; 
} catch（FileNotFoundException e）{
 e.printStackTrace（）; 
} catch（IOException e ）{
 e.printStackTrace（）; 
} 
 if（成功）{
 Toast.makeText（getApplicationContext（），图像保存成功，
 Toast .LENGTH_LONG）。show（）; 
}其他{
 Toast.makeText（getApplicationContext（），
图像保存期间出错，Toast.LENGTH_LONG）。show（）; 
} 
} 
}）; 

在上面的代码中我没有收到任何错误



它只是显示在mnt / sd / image.png 中保存文件但没有找到图像。



如果有人帮我解决了这个问题，那将是很明显的。



提前致谢

解决方案

试试这个...

 Bitmap bitmap = drawable.getBitmap（）; 
 
 String mBaseFolderPath = Environment.getExternalStorageDirectory（）。getAbsolutePath（）; 
 
 if（！new File（mBaseFolderPath）.exists（））{
 new File（mBaseFolderPath）.mkdir（）; 
} 
 
字符串mFilePath = mBaseFolderPath +/ image.png; 
 
文件file = new File（mFilePath）; 
 
 FileOutputStream stream = new FileOutputStream（file）; 
 
 if（！file.exists（））{
 file.createNewFile（）; 
} 
 
 bitmap.compress（CompressFormat.PNG，100，stream）; 
 
 bitmap.recycle（）; 
 
 stream.flush（）; 
 stream.close（）; 

Hi
Good Noon To all

I was Developing an application which will have image on image view .

My need:

What i need is When i click the button then it should store the image that exist in the image view to the sd card(emulator).

Here is how i used:(but no expected results)

Button btnWriteSDFile = (Button) findViewById(R.id.btnWriteSDFile);
btnWriteSDFile.setOnClickListener(new OnClickListener() {
public void onClick(View v) {

ImageView myImage = (ImageView) findViewById(R.id.imageView1);
BitmapDrawable drawable = (BitmapDrawable) myImage.getDrawable();
Bitmap bitmap = drawable.getBitmap();
File sdCardDirectory = Environment.getExternalStorageDirectory();
File image = new File(sdCardDirectory, "image.png");
boolean success = false;

// Encode the file as a PNG image.
FileOutputStream outStream;
try {

outStream = new FileOutputStream(image);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);


outStream.flush();
outStream.close();
success = true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (success) {
Toast.makeText(getApplicationContext(), "Image saved with success",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"Error during image saving", Toast.LENGTH_LONG).show();
}
}
});

In my above code i didnt get any error

It simply Shows that "save file in mnt/sd/image.png" but no images found.

It would be appreciable if some one helps me to get me out from this issue.

Thanks in advance

解决方案

Try this...

Bitmap bitmap = drawable.getBitmap();

String mBaseFolderPath = Environment.getExternalStorageDirectory().getAbsolutePath();
                            
if (!new File(mBaseFolderPath).exists()) {
   new File(mBaseFolderPath).mkdir();
   }

String mFilePath = mBaseFolderPath + "/image.png";

File file = new File(mFilePath);

FileOutputStream stream = new FileOutputStream(file);

if (!file.exists()){
    file.createNewFile();
}

bitmap.compress(CompressFormat.PNG, 100, stream);

bitmap.recycle();
                            
stream.flush();
stream.close();  

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