环信聊天时长按图片保存到本地

在EaseShowBigImageActivity中,显示大图片,对大图片进行长按监听

1.在ease_photo_view_save_pic.xml布局文件中添加TextView控件,点击监听,保存图片

 <TextView
        android:visibility="invisible"
        android:id="@+id/ease_photo_view_save_pic"
        android:layout_width="match_parent"
        android:layout_height="36dp"
        android:layout_alignParentBottom="true"
        android:background="#DDDDDD"
        android:gravity="center"
        android:text="保存图片" />

2.找到控件

TextView textView = (TextView) findViewById(R.id.ease_photo_view_save_pic);

EasePhotoView image = (EasePhotoView) findViewById(R.id.image);

3.处理监听

    image.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            textView.setVisibility(View.VISIBLE);
            textView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    textView.setVisibility(View.INVISIBLE);

                    new  Thread(new Runnable() {
                        @Override
                        public void run() {
                            MyFileUtil fileUtil = new MyFileUtil (EaseShowBigImageActivity.this);
                            try {
                                //保存到本地
                                final File saveFile = fileUtil .save2local(bitmap);
                                if (saveFile != null) {
                                    sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(saveFile)));//更新相册
                                    Toast.makeText(EaseShowBigImageActivity.this, "下载成功" + saveFile.toString(), Toast.LENGTH_LONG).show();
                                }
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }){}.start();
                }
            });
            return true;
        }
    });

4.保存文件

public class MyFileUtil {

/**
 * sd卡的根目录
 */
private static String mSdRootPath = Environment.getExternalStorageDirectory().getPath();
/**
 * 手机的缓存根目录
 */
private static String mDataRootPath = null;
/**
 * 保存Image的目录名
 */
private final static String FOLDER_NAME = "/temp";


public MyFileUtil (Context context) {
    mDataRootPath = context.getCacheDir().getPath();
}

/**
 * 获取储存Image的目录
 *
 * @return
 */
public static String getStorageDirectory() {
    return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) ? mSdRootPath + FOLDER_NAME : mDataRootPath + FOLDER_NAME;
}

/**
 * 根据文件名获得或者创建一个文件
 *
 * @param fileName
 * @return
 * @throws IOException
 */
public static File getFirstFile(String fileName) throws IOException {
    String path = getStorageDirectory();
    File folderFile = new File(path);
    if (!folderFile.exists()) {
        folderFile.mkdirs();
    }
    File file = new File(path + File.separator + fileName);
    file.createNewFile();
    return file;
}

/**
 * 创建一个文件夹
 */
public void makeDirs() {
    String path = getStorageDirectory();
    File folderFile = new File(path);
    if (!folderFile.exists()) {
        folderFile.mkdirs();
    }
}

/**
 * 保存Image的方法，有sd卡存储到sd卡，没有就存储到手机目录
 *
 * @param bitmap
 * @throws IOException
 */
public static File save2local(Bitmap bitmap) throws IOException {
    if (bitmap == null) {
        return null;
    }
    String currentTime = String.valueOf(System.currentTimeMillis());
    File file = getFirstFile(currentTime);
    FileOutputStream fos = new FileOutputStream(file);
    bitmap.compress(Bitmap.CompressFormat.JPEG, 80, fos);
    fos.flush();
    fos.close();

    return file;
}

}