Android之简单的拍照功能

canara

package zking.com.g150825_android_playvideo;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class camera extends Activity {

    private Button take;
    private SurfaceView ca;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);
        take = (Button) findViewById(R.id.takephoto);
        ca = (SurfaceView) findViewById(R.id.camerap);

        ca.getHolder().addCallback(new SurfaceHolder.Callback() {

            private Camera camera;

            @Override
            public void surfaceCreated(SurfaceHolder surfaceHolder) {
                camera = Camera.open();
                Camera.Parameters parameters=camera.getParameters();
                parameters.setPreviewFormat(PixelFormat.JPEG);
                parameters.set("jpeg-quality",85);
                camera.setParameters(parameters);

                try {
                    camera.setPreviewDisplay(ca.getHolder());
                    camera.startPreview();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder surfaceHolder) {

            }
        });


                take.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {

                        //将字节数组转成图片
                        //实例化输出流对象，将bytes写入即可

                        //压缩
                        //将字节数组转成图片
                        Bitmap bitmap=BitmapFactory.decodeByteArray(bytes,0,bytes.length);
                        try {
                            FileOutputStream fos=new FileOutputStream("/mnt/sdcard/Movies/mv"+System.currentTimeMillis()+".png");
                            bitmap.compress(Bitmap.CompressFormat.PNG,85,fos);

                            camera.stopPreview();
                            camera.startPreview();

                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        }


                    }
                });


            }


        }

activity_camera

最后不要忘记添加相机的权限：