存储位图图像到SD卡中的Andr​​oid [英] Store Bitmap image to SD Card in Android

问题描述

我面临着一些奇怪的问题，我的Andr​​oid code， 我有位图变的图像，并要保存该文件到SD卡。 我code如下，

I am facing some strange problem with my android code, I have an image in Bitmap variable and want to save that file to SD card. I code as follow,

Bitmap IMAGE // Loaded from internet servers.;
try {
    File _sdCard = Environment.getExternalStorageDirectory();
    File _picDir  = new File(_sdCard, "MyDirectory");
    _picDir.mkdirs();

    File _picFile = new File(_picDir,  "MyImage.jpg");
    FileOutputStream _fos = new FileOutputStream(_picFile);
    IMAGE.compress(Bitmap.CompressFormat.JPEG, 100, _fos);
    _fos.flush();
    _fos.close();
    Toast.makeText(this, "Image Downloaded", 7000).show();
} catch (Exception ex) {
    ex.printStackTrace();
    Toast.makeText(this, ex.getMessage(), 7000).show();
}

我使用索尼Experia还电弧作为我的测试装置，当手机连接到我的电脑中，code工作不错，它存储的图像，并显示在画廊。但是，当我拔下电话从我的电脑和测试应用程序，它不保存图片，并没有表现出任何异常。

I am using Sony Experia Arc as my testing device, when the phone is connected to my computer, the code works nice, it stores image and also displays in gallery. But when I disconnect phone from my computer and test the app, it doesn't save picture and doesn't show any exception.

推荐答案

使用此功能

 void saveImage() {

    String root = Environment.getExternalStorageDirectory().toString();
    File myDir = new File(root + "/saved_images");

    String fname = "Image.jpg";
    File file = new File (myDir, fname);
    if (file.exists ()) file.delete (); 
    try {
           FileOutputStream out = new FileOutputStream(file);
           myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
           out.flush();
           out.close();

    } catch (Exception e) {
           e.printStackTrace();
    }
}

检查这个答案将提供更多的细节 Android的文件保存到外部存储

Check this answer will give more details Android saving file to external storage

这篇关于存储位图图像到SD卡中的Andr​​oid的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！