Android打开相机和相册实例代码

 /**
   * 选择相机
   */

  private void showCamera() {
    // 跳转到系统照相机
    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (cameraIntent.resolveActivity(getPackageManager()) != null) {
      // 设置系统相机拍照后的输出路径
      // 创建临时文件
      mTmpFile = OtherUtils.createFile(getApplicationContext());

      cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mTmpFile));
      startActivityForResult(cameraIntent, REQUEST_CAMERA);
    } else {
      Toast.makeText(getApplicationContext(), R.string.msg_no_camera, Toast.LENGTH_SHORT).show();
    }

  } 

Intent albumIntent = new Intent(Intent.ACTION_PICK, null);
    albumIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
    startActivityForResult(albumIntent, REQUEST_ALBUM_OK); 

 @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    switch (requestCode) {
      case REQUEST_CAMERA:
        //请求相机
        if (mTmpFile != null) {
          Log.d(TAG, "onActivityResult: 请求相机： " + mTmpFile.getAbsolutePath());

          Picasso.with(this).load(mTmpFile).centerCrop().resize(OtherUtils.dip2px(this,100),OtherUtils.dip2px(this,100))
              .error(R.mipmap.pictures_no).into(mIvDispaly);
        }
        break;
      case REQUEST_ALBUM_OK:
        Log.d(TAG, "onActivityResult:相册 " + data.getData().toString());
        ContentResolver resolver = getContentResolver();

        try {
          InputStream inputStream = resolver.openInputStream(data.getData());

          Bitmap bitmap = BitmapFactory.decodeStream(inputStream);

          mIvDispaly.setImageBitmap(bitmap);

        } catch (FileNotFoundException e) {


          e.printStackTrace();
        }

        //        Cursor query = resolver.query(data.getData(), null, null, null, null);
//
//        String str = null;
//        while (query.moveToNext()) {
//          Log.d(TAG, "onActivityResult:数量 " + query.getCount());
//          str =query.getString(query.getColumnIndex(MediaStore.Images.Media.DATA));
//          Log.d(TAG, "onActivityResult: 列名" + query.getString(query.getColumnIndex(MediaStore.Images.Media.DATA)));
//        }
//        query.close();
//        Picasso.with(this).load(new File(str)).centerCrop().resize(OtherUtils.dip2px(this,100),OtherUtils.dip2px(this,100))
//            .error(R.mipmap.pictures_no).into(mIvDispaly);
        break;

    }
  } 

import android.content.Context;
import android.os.Environment;

import java.io.File;
import java.util.Date;

/**
 * Created by 刘楠 on 2016/7/20 0020.22:37
 */
public class OtherUtils {
  public static int dip2px(Context context, float dpValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dpValue * scale + 0.5f);
  }

  public static int px2dip(Context context, float pxValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (pxValue / scale + 0.5f);
  }

  /**
   * 获取拍照相片存储文件
   * @param context
   * @return
   */
  public static File createFile(Context context){
    File file;
    if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
      String timeStamp = String.valueOf(new Date().getTime());
      file = new File(Environment.getExternalStorageDirectory() +
          File.separator + timeStamp+".jpg");
    }else{
      File cacheDir = context.getCacheDir();
      String timeStamp = String.valueOf(new Date().getTime());
      file = new File(cacheDir, timeStamp+".jpg");
    }
    return file;
  }

}