Android Camera开发手电筒功能
这是一个简单的运用AndroidCamera开发手电筒功能，AndroidManifest.xml文件的入口是startapp，这个文件没上传上来，大家可以自己写。
flashlight.java
packagecom.android.app;
importandroid.app.Activity;
importandroid.hardware.Camera;
importandroid.hardware.Camera.Parameters;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.widget.TextView;
importandroid.widget.Toast;
publicclassMainextendsActivity{
privatebooleanisopent=false;
privateCameracamera;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
//TODOAuto-generatedmethodstub
super.onCreate(savedInstanceState);
Viewview=View.inflate(this,R.layout.main,null);
setContentView(view);
TextViewimg_but=(TextView)findViewById(R.id.main_img);
img_but.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
//TODOAuto-generatedmethodstub
if(!isopent){
Toast.makeText(getApplicationContext(),"您已经打开了手电筒",0)
.show();
camera=Camera.open();
Parametersparams=camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();//开始亮灯
isopent=true;
}else{
Toast.makeText(getApplicationContext(),"关闭了手电筒",
Toast.LENGTH_SHORT).show();
camera.stopPreview();//关掉亮灯
camera.release();//关掉照相机
isopent=false;
}
}
});
}
}
布局文件代码
<?xmlversion="1.0"encoding="utf-8"?> <LinearLayoutxmlns:android="<ahref="http://schemas.android.com/apk/res/android""rel="nofollow"target="_blank">http://schemas.android.com/apk/res/android"</a> android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/main_img" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/main_body"> </TextView> </LinearLayout>
AndroidManifest.xml文件
<manifestxmlns:android="<ahref="http://schemas.android.com/apk/res/android""rel="nofollow"target="_blank">http://schemas.android.com/apk/res/android"</a> package="com.android.app" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15"/> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme"> <activityandroid:name=".AppStart"> <intent-filter> <actionandroid:name="android.intent.action.MAIN"/> <categoryandroid:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> <activityandroid:name=".Main"> </activity> </application> <!--摄像头、手电筒--> <uses-permissionandroid:name="android.permission.CAMERA"/> <uses-permissionandroid:name="android.permission.FLASHLIGHT"/> <uses-featureandroid:name="android.hardware.camera"/> <uses-featureandroid:name="android.hardware.camera.autofocus"/> <uses-featureandroid:name="android.hardware.camera.flash"/> </manifest>
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。