android实现定时拍照功能

2023-09-12 05:05:04 69

在手机上面实现，设置一段时间（以秒计时）之后，自动拍照，适用于摄影师建立一个场景，之后设置时间，再进入场景。

界面主要就是一个设置时间的EditText和启动倒计时的Button，设置完时间之后，点击倒计时按钮。

在清单文件中加入权限：

主程序：

packagecn.yh.cameradelaycontroll;

importjava.io.OutputStream;
importjava.util.Iterator;
importjava.util.List;

importandroid.app.Activity;
importandroid.content.ContentValues;
importandroid.content.res.Configuration;
importandroid.hardware.Camera;
importandroid.hardware.Camera.PictureCallback;
importandroid.net.Uri;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.provider.MediaStore.Images.Media;
importandroid.text.Editable;
importandroid.text.TextWatcher;
importandroid.util.Log;
importandroid.view.Menu;
importandroid.view.SurfaceHolder;
importandroid.view.SurfaceView;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.TextView;
importandroid.widget.Toast;

publicclassMainActivityextendsActivityimplementsSurfaceHolder.Callback,
OnClickListener,PictureCallback{

privatestaticfinalStringCAMERA_CONTROLL="CAMERA_CONTROLL";
privateSurfaceViewimageSView;
privateButtonstartButton;
//privateTextViewcountDownTextView;
privateEditTextcountDownEditTextView;
privateCameracamera;
privateSurfaceHoldersurfaceHolder;
privateHandlertimerUpdateHandler;
privatebooleantimerRunning=false;
privateintcurrentTimer=10;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageSView=(SurfaceView)findViewById(R.id.imageView);
startButton=(Button)findViewById(R.id.startBtn);
//countDownTextView=(TextView)findViewById(R.id.countDowntextView);
countDownEditTextView=(EditText)findViewById(R.id.countDownEditTextView);
/*
countDownEditTextView.addTextChangedListener(newTextWatcher(){

@Override
publicvoidonTextChanged(CharSequences,intstart,intbefore,
intcount){
//TODOAuto-generatedmethodstub
}

@Override
publicvoidbeforeTextChanged(CharSequencearg0,intarg1,
intarg2,intarg3){
//TODOAuto-generatedmethodstub

}

@Override
publicvoidafterTextChanged(Editablearg0){
//TODOAuto-generatedmethodstub
currentTimer=Integer.parseInt(countDownEditTextView.getText().toString());
}
});
*/
surfaceHolder=imageSView.getHolder();

surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

surfaceHolder.addCallback(this);

startButton.setOnClickListener(this);

timerUpdateHandler=newHandler();
}

@Override
publicbooleanonCreateOptionsMenu(Menumenu){
//Inflatethemenu;thisaddsitemstotheactionbarifitispresent.
getMenuInflater().inflate(R.menu.main,menu);
returntrue;
}

@Override
publicvoidonPictureTaken(byte[]data,Cameracamera){
//TODOAuto-generatedmethodstub
UriimageFileUri=getContentResolver().insert(
Media.EXTERNAL_CONTENT_URI,newContentValues());
try{
OutputStreamimageFileOS=getContentResolver().openOutputStream(
imageFileUri);
imageFileOS.write(data);
imageFileOS.flush();
imageFileOS.close();
}catch(Exceptione){
//TODOAuto-generatedcatchblock
Toast.makeText(this,e.getMessage(),Toast.LENGTH_LONG).show();
}
camera.startPreview();
}

@Override
publicvoidonClick(Viewv){
//TODOAuto-generatedmethodstub
currentTimer=Integer.parseInt(countDownEditTextView.getText().toString());
switch(v.getId()){
caseR.id.startBtn:
if(!timerRunning){
timerRunning=true;
timerUpdateHandler.post(timerUpdateTask);
}
break;
}
}

privateRunnabletimerUpdateTask=newRunnable(){

@Override
publicvoidrun(){
//TODOAuto-generatedmethodstub
if(currentTimer>1){
currentTimer--;
timerUpdateHandler.postDelayed(timerUpdateTask,1000);
}else{
camera.takePicture(null,null,null,MainActivity.this);
timerRunning=false;
currentTimer=10;
}
countDownEditTextView.setText(currentTimer+"");
}
};

@Override
publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth,
intheight){
//TODOAuto-generatedmethodstub
camera.startPreview();
}

@Override
publicvoidsurfaceCreated(SurfaceHolderholder){
//TODOAuto-generatedmethodstub
intcameraNums=Camera.getNumberOfCameras();
Log.e(CAMERA_CONTROLL,cameraNums+"");
try{
camera=Camera.open(cameraNums-1);
}catch(Exceptione){
Log.e(CAMERA_CONTROLL,e.getMessage());
}
try{
camera.setPreviewDisplay(holder);
Camera.Parametersparameters=camera.getParameters();
if(this.getResources().getConfiguration().orientation!=Configuration.ORIENTATION_LANDSCAPE){
parameters.set("orientation","portrait");
camera.setDisplayOrientation(90);
parameters.setRotation(90);
}
ListcolorEffects=parameters.getSupportedColorEffects();
Iteratorcei=colorEffects.iterator();
while(cei.hasNext()){
StringcurrentEffect=cei.next();
if(currentEffect.equals(Camera.Parameters.EFFECT_SOLARIZE)){
parameters
.setColorEffect(Camera.Parameters.EFFECT_SOLARIZE);
break;
}
}
camera.setParameters(parameters);
}catch(Exceptione){
//TODOAuto-generatedcatchblock
//e.printStackTrace();
camera.release();
}
}

@Override
publicvoidsurfaceDestroyed(SurfaceHolderholder){
//TODOAuto-generatedmethodstub
camera.stopPreview();
camera.release();
}

}

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android实现定时拍照功能

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