Android打开相机和打开相册

打开相机

 /**
     * 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();
        }

    }

打开相册

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

onActivityResult

 @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;

        }
    }

OtherUtils

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;
    }

}