Android 从本地图库或拍照后裁剪图片并设置头像

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@ id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         />

    <Button
        android:id="@ id/buttonLocal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="本地相册选择头像图片" />

    <Button
        android:id="@ id/buttonCamera"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="手机相机选择头像图片" />

</LinearLayout>

public class MainActivity extends AppCompatActivity {

    /* 头像图片文档 */
    private static final String IMAGE_FILE_NAME = "temp_head_image.jpg";

    /* 要求标识码 */
    private static final int CODE_GALLERY_REQUEST = 0xa0;//当地
    private static final int CODE_CAMERA_REQUEST = 0xa1;//照相
    private static final int CODE_RESULT_REQUEST = 0xa2;//最后剪裁后的結果

    // 剪裁后照片的宽(X)和高(Y),480 X 480的方形。
    private static int output_X = 600;
    private static int output_Y = 600;

    private ImageView headImage = null;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        headImage = (ImageView) findViewById(R.id.imageView);

        Button buttonLocal = (Button) findViewById(R.id.buttonLocal);
        buttonLocal.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                choseHeadImageFromGallery();
            }
        });

        Button buttonCamera = (Button) findViewById(R.id.buttonCamera);
        buttonCamera.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                choseHeadImageFromCameraCapture();
            }
        });
    }

    // 从本地相册选择照片做为头像图片
    private void choseHeadImageFromGallery() {
        Intent intentFromGallery = new Intent();
        // 设定文件属性
        intentFromGallery.setType("image/*");//选择的图片
        intentFromGallery.setAction(Intent.ACTION_GET_CONTENT);
        //假如你要在Activity中获得新开启Activity关掉后回到的数据信息，
        //你需要应用系统软件出示的startActivityForResult(Intent intent,int requestCode)方式开启新的Activity
        startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST);
    }

    // 运行手机照相机拍攝相片做为头像图片
    private void choseHeadImageFromCameraCapture() {
        Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        // 分辨储存卡是不是能用，储存相片文档
        if (hasSdcard()) {
            intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT, Uri
                    .fromFile(new File(Environment
                            .getExternalStorageDirectory(), IMAGE_FILE_NAME)));
        }

        startActivityForResult(intentFromCapture, CODE_CAMERA_REQUEST);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode,
                                    Intent intent) {

        // 客户沒有开展合理的设定实际操作，回到
        if (resultCode == RESULT_CANCELED) {//撤消
            Toast.makeText(getApplication(), "撤消", Toast.LENGTH_LONG).show();
            return;
        }

        switch (requestCode) {
            case CODE_GALLERY_REQUEST://如果是来源于当地的
                cropRawPhoto(intent.getData());//立即裁剪图片
                break;

            case CODE_CAMERA_REQUEST:
                if (hasSdcard()) {
                    File tempFile = new File(
                            Environment.getExternalStorageDirectory(),
                            IMAGE_FILE_NAME);
                    cropRawPhoto(Uri.fromFile(tempFile));
                } else {
                    Toast.makeText(getApplication(), "沒有SDCard!", Toast.LENGTH_LONG)
                            .show();
                }

                break;

            case CODE_RESULT_REQUEST:
                if (intent != null) {
                    setImageToHeadView(intent);//设定图片框
                }

                break;
        }

        super.onActivityResult(requestCode, resultCode, intent);
    }

    /**
     * 剪裁初始的照片
     */
    public void cropRawPhoto(Uri uri) {

        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");

        //把剪裁的数据信息填写里边

        // 设定剪裁
        intent.putExtra("crop", "true");

        // aspectX , aspectY :高宽的占比
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);

        // outputX , outputY : 裁剪图片高宽
        intent.putExtra("outputX", output_X);
        intent.putExtra("outputY", output_Y);
        intent.putExtra("return-data", true);

        startActivityForResult(intent, CODE_RESULT_REQUEST);
    }

    /**
     * 获取储存剪裁以后的照片数据信息，并设置头像一部分的View
     */
    private void setImageToHeadView(Intent intent) {
        Bundle extras = intent.getExtras();
        if (extras != null) {
            Bitmap photo = extras.getParcelable("data");
            headImage.setImageBitmap(photo);

　　　　　　　//新建文件夹 先选定途径 再启用mkdir涵数 现在是网站根目录下边的Ask文件夹名称
            File nf = new File(Environment.getExternalStorageDirectory() "/Ask");
            nf.mkdir();

　　　　　　　//在网站根目录下边的ASk文件夹名称下 建立okkk.jpg文档
            File f = new File(Environment.getExternalStorageDirectory() "/Ask", "okkk.jpg");

            FileOutputStream out = null;
            try {

　　　　　　　　　　//开启輸出流 将照片数据信息填写文档中
                out = new FileOutputStream(f);
                photo.compress(Bitmap.CompressFormat.PNG, 90, out);

                try {
                    out.flush();
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

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


        }
    }

    /**
     * 检查设备是不是存有SDCard的专用工具方式
     */
    public static boolean hasSdcard() {
        String state = Environment.getExternalStorageState();
        if (state.equals(Environment.MEDIA_MOUNTED)) {
            // 有储存的SDCard
            return true;
        } else {
            return false;
        }
    }
}

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>