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

<?xml version="1.0" encoding="utf-8"?>

最后不要忘记添加相机的权限：

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