android 7自定义相机预览及拍照功能
本文实例为大家分享了Android实现摄像头切换，拍照及保存到相册，预览等功能，解决android7拍照之后不能连续预览的问题、参数设置相关问题以及前后摄像头语言颠倒等问题。
importandroid.Manifest;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.pm.PackageManager;
importandroid.graphics.Bitmap;
importandroid.graphics.BitmapFactory;
importandroid.graphics.Matrix;
importandroid.graphics.PixelFormat;
importandroid.hardware.Camera;
importandroid.net.Uri;
importandroid.os.Build;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.os.Handler;
importandroid.support.v4.app.ActivityCompat;
importandroid.util.Log;
importandroid.view.KeyEvent;
importandroid.view.SurfaceHolder;
importandroid.view.SurfaceView;
importandroid.view.View;
importandroid.view.WindowManager;
importandroid.widget.TextView;
importcom.hama.tracker.R;
importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.Iterator;
importjava.util.List;
publicclassCamaraActivityextendsActivityimplementsView.OnClickListener{
@Bind(R.id.return_back)
TextViewreturnBack;
@Bind(R.id.tvswitch_camera)
TextViewtvswitchCamera;
//启动摄像机
privateCameramCamera;
publicbooleanisopen_camara=false;
privateSurfaceViewsurfaceView;
privateSurfaceHoldermholder=null;
privateSurfaceCallbackpreviewCallBack;
privatebooleanisTakingPhoto;//是否正在拍照
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
verifyPermission(newString[]{Manifest.permission.CAMERA});
//getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_camara);
ButterKnife.bind(this);
//预览控件
surfaceView=(SurfaceView)this
.findViewById(R.id.surfaceView);
//设置参数
surfaceView.getHolder().setKeepScreenOn(true);
surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
returnBack.setOnClickListener(this);
tvswitchCamera.setOnClickListener(this);
EventBus.getDefault().register(this);
}
publicvoidverifyPermission(String[]permissions){
if(permissions!=null){
Listlists=newArrayList<>();
for(inti=0;i0){
String[]ps=newString[lists.size()];
for(inti=0;isizeList=parameters.getSupportedPreviewSizes();
//如果sizeList只有一个我们也没有必要做什么了，因为就他一个别无选择
if(sizeList.size()>1){
Iteratoritor=sizeList.iterator();
while(itor.hasNext()){
Camera.Sizecur=itor.next();
/*if(cur.width>=PreviewWidth
&&cur.height>=PreviewHeight){*/
if(cur.width>=PreviewWidth
&&cur.height>=PreviewHeight){
PreviewWidth=cur.width;
PreviewHeight=cur.height;
break;
}
}
}
parameters.setPreviewSize(PreviewWidth,PreviewHeight);//获得摄像区域的大小
//parameters.setPreviewFrameRate(3);//每秒3帧每秒从摄像头里面获得3个画面
//parameters.setPreviewFpsRange(3,);
Listlist=parameters.getSupportedPreviewFpsRange();
int[]v=null;
intindex=0;
intmin=0;
for(inti=0;imin){
min=v[0];
index=i;
}
}
parameters.setPreviewFpsRange(list.get(index)[0],list.get(index)[1]);
parameters.setPictureFormat(PixelFormat.JPEG);//设置照片输出的格式
parameters.set("jpeg-quality",85);//设置照片质量
parameters.setPictureSize(PreviewWidth,PreviewHeight);//设置拍出来的屏幕大小
parameters.setRotation(180);//Java部分
if(Build.VERSION.SDK_INT>=24){
if(postion==0){
mCamera.setDisplayOrientation(90);
}else{
mCamera.setDisplayOrientation(270);
}
}else{
mCamera.setDisplayOrientation(90);
}
mCamera.setParameters(parameters);//把上面的设置赋给摄像头
mCamera.setPreviewDisplay(mySurfaceView);//把摄像头获得画面显示在SurfaceView控件里面
mholder=mySurfaceView;
mCamera.setPreviewCallback(newCamera.PreviewCallback(){
@Override
publicvoidonPreviewFrame(byte[]data,Cameracamera){
}
});
mCamera.startPreview();//开始预览
//mPreviewRunning=true;
}catch(IOExceptione){
Log.e("tag",e.toString());
}
}
Handlerhandler=null;
privatevoidautoTakePhoto(){
//拍照前需要对焦获取清析的图片
if(null==mCamera)return;
mCamera.autoFocus(newCamera.AutoFocusCallback(){
@Override
publicvoidonAutoFocus(booleansuccess,Cameracamera){
if(success&&isopen_camara){
//对焦成功
//Toast.makeText(MainActivity.this,"对焦成功!!",Toast.LENGTH_SHORT).show();
if(!isTakingPhoto){
isTakingPhoto=true;
handler=newHandler();
handler.post(newRunnable(){
@Override
publicvoidrun(){
mCamera.takePicture(null,null,newMyPictureCallback());
}
});
}
}
}
});
}
//照片回调
privatefinalclassMyPictureCallbackimplementsCamera.PictureCallback{
//照片生成后
@Override
publicvoidonPictureTaken(byte[]data,Cameracamera){
try{
Bitmapbitmap=BitmapFactory.decodeByteArray(data,0,data.length);
Matrixmatrix=newMatrix();
matrix.setRotate(270);
FilejpgFile=newFile(Environment.getExternalStorageDirectory()+"/DCIM/camera");
if(!jpgFile.exists()){
jpgFile.mkdir();
}
FilejpgFile1=newFile(jpgFile.getAbsoluteFile(),System.currentTimeMillis()+".jpg");
bitmap=Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
FileOutputStreamfos=newFileOutputStream(jpgFile1);
bitmap.compress(Bitmap.CompressFormat.JPEG,80,fos);
ToastUtils.show(getApplicationContext(),getString(R.string.save_success));
fos.close();
Intentintent=newIntent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uriuri=Uri.fromFile(jpgFile1);
intent.setData(uri);
sendBroadcast(intent);
}catch(Exceptione){
e.printStackTrace();
}finally{
if(Build.VERSION.SDK_INT>=24){
reset();
}
isTakingPhoto=false;
}
}
}
privateintcameraPosition=1;//0代表前置摄像头，1代表后置摄像头
privatevoidswitchCamara(){
//切换前后摄像头
intcameraCount=0;
Camera.CameraInfocameraInfo=newCamera.CameraInfo();
cameraCount=Camera.getNumberOfCameras();//得到摄像头的个数
for(inti=0;i
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。