怎么调用系统自带的图库看图片

来源：互联网发布：炒股票下载什么软件编辑：程序博客网时间：2024/04/30 06:04

public class TupianActivity extends Activity {

public static final int NONE = 0;
public static final int PHOTOHRAPH = 1;// 拍照
public static final int PHOTOZOOM = 2; // 缩放
public static final int PHOTORESOULT = 3;// 结果

public static final String IMAGE_UNSPECIFIED = "image/*";
ImageView imageView = null;
Button button0 = null;
Button button1 = null;

@Override
public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
      imageView = (ImageView) findViewById(R.id.imageID);
      button0 = (Button) findViewById(R.id.btn_01);
      button1 = (Button) findViewById(R.id.btn_02);

      button0.setOnClickListener(new OnClickListener() {
         @Override
         public void onClick(View v) {
            Intent intent = new Intent(Intent.ACTION_PICK, null);//就是根据查找的信息来返回所找的东西
            intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
            startActivityForResult(intent, PHOTOZOOM);
         }
      });

      button1.setOnClickListener(new OnClickListener() {

         @Override
         public void onClick(View v) {
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg")));
            startActivityForResult(intent, PHOTOHRAPH);
         }
      });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      if (resultCode == NONE)
        {System.out.println("没反应");
         return; }
      // 拍照
      if (requestCode == PHOTOHRAPH) {
         //设置文件保存路径这里放在跟目录下
//          File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
//          startPhotoZoom(Uri.fromFile(picture));
         Uri uri = data.getData();
         Bitmap b = BitmapFactory.decodeFile(uri.getEncodedPath());
         imageView.setImageBitmap(b);
      }

      if (data == null)
        {System.out.println("数据为空");
         return;}

      // 读取相册缩放图片
      if (requestCode == PHOTOZOOM) {
        System.out.println("照相");
         ContentResolver resolver = getContentResolver();

//         startPhotoZoom(data.getData());
           Uri uri = data.getData();
           Bitmap b = null;
try {
b = MediaStore.Images.Media.getBitmap(resolver, uri);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} //显得到bitmap图片
           System.out.println(uri.getPath());
            imageView.setImageBitmap(b);
      }
      // 处理结果
      if (requestCode == PHOTORESOULT) {
         Bundle extras = data.getExtras();
         if (extras != null) {
            Bitmap photo = extras.getParcelable("data");
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0 - 100)压缩文件
            imageView.setImageBitmap(photo);
         }

      }

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

public void startPhotoZoom(Uri uri) {
      Intent intent = new Intent("com.android.camera.action.CROP");
      intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
      intent.putExtra("crop", "true");
      // aspectX aspectY 是宽高的比例
      intent.putExtra("aspectX", 1);
      intent.putExtra("aspectY", 1);
      // outputX outputY 是裁剪图片宽高
      intent.putExtra("outputX", 64);
      intent.putExtra("outputY", 64);
      intent.putExtra("return-data", true);
      startActivityForResult(intent, PHOTORESOULT);
}
}