拍照打开相册

打开系统摄像头拍照或打开相册获取图片并显示public class MainActivity extends AppCompatActivity implements View.OnClickListener {    Button takePhoto;    Bitmap photo;    String picPath;    Button capture;    ImageView imageView;    OkHttpClient mOkHttpClient;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        takePhoto = (Button) findViewById(R.id.button1);        capture = (Button) findViewById(R.id.capture);        imageView = (ImageView) findViewById(R.id.img);        takePhoto.setOnClickListener(this);        capture.setOnClickListener(this);    }      @Override    public void onClick(View view) {        switch (view.getId()) {            case R.id.button1: {// 打开相机                String state = Environment.getExternalStorageState();// 获取内存卡可用状态                if (state.equals(Environment.MEDIA_MOUNTED)) {// 内存卡状态可用                    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");                    startActivityForResult(intent, 1);                } else {// 不可用                    Toast.makeText(MainActivity.this, "内存不可用", Toast.LENGTH_LONG)                            .show();                }                break;            }            case R.id.capture: {// 打开相册// 打开本地相册                Intent i = new Intent(                        Intent.ACTION_PICK,                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);// 设定结果返回                startActivityForResult(i, 2);                break;            }            default:                break;        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        if (data != null) {            switch (requestCode) {                case 1:// 两种方式 获取拍好的图片                    if (data.getData() != null || data.getExtras() != null) { // 防止没有返回结果                        Uri uri = data.getData();                        if (uri != null) {                            this.photo = BitmapFactory.decodeFile(uri.getPath()); // 拿到图片                        }                        if (photo == null) {                            Bundle bundle = data.getExtras();                            if (bundle != null) {                                photo = (Bitmap) bundle.get("data");                                FileOutputStream fileOutputStream = null;                                try {// 获取 SD 卡根目录 生成图片并                                    String saveDir = Environment                                            .getExternalStorageDirectory()                                            + "/dhj_Photos";// 新建目录                                    File dir = new File(saveDir);                                    if (!dir.exists())                                        dir.mkdir();// 生成文件名                                    SimpleDateFormat t = new SimpleDateFormat(                                            "yyyyMMddssSSS");                                    String filename = "MT" + (t.format(new Date()))                                            + ".jpg";// 新建文件                                    File file = new File(saveDir, filename);// 打开文件输出流                                    fileOutputStream = new FileOutputStream(file);// 生成图片文件                                    this.photo.compress(Bitmap.CompressFormat.JPEG,                                            100, fileOutputStream);// 相片的完整路径                                    this.picPath = file.getPath();                                    imageView.setImageBitmap(this.photo);                                } catch (Exception e) {                                    e.printStackTrace();                                } finally {                                    if (fileOutputStream != null) {                                        try {                                            fileOutputStream.close();                                        } catch (Exception e) {                                            e.printStackTrace();                                        }                                    }                                }                                Toast.makeText(getApplicationContext(), "获取到了",                                        Toast.LENGTH_SHORT).show();                            } else {                                Toast.makeText(getApplicationContext(), "找不到图片",                                        Toast.LENGTH_SHORT).show();                            }                        }                    }                    break;                case 2: {//打开相册并选择照片，这个方式选择单张// 获取返回的数据，这里是android自定义的Uri地址                    Uri selectedImage = data.getData();                    String[] filePathColumn = {MediaStore.Images.Media.DATA};// 获取选择照片的数据视图                    Cursor cursor = getContentResolver().query(selectedImage,                            filePathColumn, null, null, null);                    cursor.moveToFirst();// 从数据视图中获取已选择图片的路径                    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);                    String picturePath = cursor.getString(columnIndex);                    cursor.close();// 将图片显示到界面上                    imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));                    break;                }                default:                    break;            }        }    }}