android多媒体——5步学会使用系统相机

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

Intent intent = new Intent();
                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//隐式启动系统相机

file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");//新建相机图片保存位置，图片名称

                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                ////告知相机图片保存位置

                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));

startActivityForResult(intent, 0x23);

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //data包含缩略图
        if (requestCode == 0x23) {
            if (resultCode == RESULT_OK) {
                imageView.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
                //imageView.setImageURI(Uri.fromFile(file));//得到图片

            }
        }

    }

程序源码

public class MainActivity extends Activity {
    private Button button;
    private ImageView imageView;
    private File file;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button);
        imageView = (ImageView) findViewById(R.id.imageview);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

              Intent intent = new Intent();
                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//隐式启动系统相机
               file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");//新建相机图片保存位置，图片名称

                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                ////告知相机图片保存位置

                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
               startActivityForResult(intent, 0x23);

            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //data缩略图
        if (requestCode == 0x23) {
            if (resultCode == RESULT_OK) {
                imageView.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
                //imageView.setImageURI(Uri.fromFile(file));//得到图片

                data.getIntExtra(MediaStore.EXTRA_OUTPUT,0);

            }
        }

    }
}