Android(安卓)保存图片到本地

现在项目中基本都有这样的需求，把图片保存到本地相册

这是一个工具类代码如下：

public class ImgUtils {    /**     * 保存文件到指定路径     */    public static boolean saveImageToGallery(Context context, Bitmap bmp){        // 首先保存图片        String storePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "dearxy";        File appDir = new File(storePath);        if (!appDir.exists()) {            appDir.mkdir();        }        String fileName = System.currentTimeMillis() + ".jpg";        File file = new File(appDir, fileName);        try {            FileOutputStream fos = new FileOutputStream(file);            //通过io流的方式来压缩保存图片            boolean isSuccess = bmp.compress(Bitmap.CompressFormat.JPEG, 60, fos);            fos.flush();            fos.close();            //把文件插入到系统图库            //MediaStore.Images.Media.insertImage(context.getContentResolver(), file.getAbsolutePath(), fileName, null);            //保存图片后发送广播通知更新数据库            Uri uri = Uri.fromFile(file);            context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));            if (isSuccess) {                return true;            } else {                return false;            }        } catch (IOException e) {            e.printStackTrace();        }        return false;    }}

Android 6.0的手机需要先申请权限，拿到权限后再保存，否则会失败
添加依赖

compile ‘pub.devrel:easypermissions:0.3.0’

实现EasyPermissions.PermissionCallbacks，重写获取权限的方法

    @OnClick(R.id.save)    public void save() {        requestPermission();    }    /**     * 请求读取sd卡的权限     */    private void requestPermission() {        if (Build.VERSION.SDK_INT >= 23) {            //读取sd卡的权限            String[] mPermissionList = new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};            if (EasyPermissions.hasPermissions(getApplicationContext(), mPermissionList)) {                //已经同意过                saveImage();            } else {                //未同意过,或者说是拒绝了，再次申请权限                EasyPermissions.requestPermissions(                        this,  //上下文                        "保存图片需要读取sd卡的权限", //提示文言                        REQUEST_CODE_SAVE_IMG, //请求码                        mPermissionList //权限列表                );            }        } else {            saveImage();        }    }    /**     * 保存图片     */    private void saveImage() {        System.out.println(" 6666 ");        System.out.println(current + " current ");        final String urls = imagesUrl.get(current);        System.out.println(urls + " url ");        System.out.println(" 8888 ");//        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.fj);        new Thread(new Runnable() {            Bitmap bitmap = null;            @Override            public void run() {                URL url = null;                try {                    url = new URL("http://test.zuihou99.com" + urls);                    InputStream is = null;                    BufferedInputStream bis = null;                    try {                        is = url.openConnection().getInputStream();                        bis = new BufferedInputStream(is);                        bitmap = BitmapFactory.decodeStream(bis);                        boolean isSaveSuccess = ImgUtils.saveImageToGallery(getApplicationContext(), bitmap);                        if (isSaveSuccess) {                            Looper.prepare();                            Toast.makeText(getApplicationContext(), "保存图片成功", Toast.LENGTH_SHORT).show();                            Looper.loop();                        } else {                            Looper.prepare();                            Toast.makeText(getApplicationContext(), "保存图片失败，请稍后重试", Toast.LENGTH_SHORT).show();                            Looper.loop();                        }                    } catch (IOException e) {                        e.printStackTrace();                    }                } catch (MalformedURLException e) {                    e.printStackTrace();                }            }        }).start();    }    /**     * 根据图片的url路径获得Bitmap对象     *     * @param url     * @return     */    private Bitmap decodeUriAsBitmapFromNet(String url) {        URL fileUrl = null;        Bitmap bitmap = null;        try {            fileUrl = new URL(url);        } catch (MalformedURLException e) {            e.printStackTrace();        }        try {            HttpURLConnection conn = (HttpURLConnection) fileUrl                    .openConnection();            conn.setDoInput(true);            conn.connect();            InputStream is = conn.getInputStream();            bitmap = BitmapFactory.decodeStream(is);            is.close();        } catch (IOException e) {            e.printStackTrace();        }        return bitmap;    }    //授权结果，分发下去    @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        // Forward results to EasyPermissions        //跳转到onPermissionsGranted或者onPermissionsDenied去回调授权结果        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);    }    //同意授权    @Override    public void onPermissionsGranted(int requestCode, List list) {        saveImage();    }    //拒绝授权    @Override    public void onPermissionsDenied(int requestCode, List perms) {        if (EasyPermissions.somePermissionPermanentlyDenied(this, perms)) {            //打开系统设置，手动授权            new AppSettingsDialog.Builder(this).build().show();        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == AppSettingsDialog.DEFAULT_SETTINGS_REQ_CODE) {            //拒绝授权后，从系统设置了授权后，返回APP进行相应的操作            saveImage();        }    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // TODO: add setContentView(...) invocation        ButterKnife.bind(this);    }

这样就可以了，有不对的欢迎指出

这里附上源码http://download.csdn.net/download/qq_23668969/10042303

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