这是一个简单的运用Android Camera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

package com.android.app; import android.app.Activity; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.os.Bundle; import android.view.View; import android.widget.TextView; import android.widget.Toast; public class Main extends Activity { private boolean isopent = false; private Camera camera; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); View view = View.inflate(this, R.layout.main, null); setContentView(view); TextView img_but = (TextView) findViewById(R.id.main_img); img_but.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (!isopent) { Toast.makeText(getApplicationContext(), "您已经打开了手电筒", 0) .show(); camera = Camera.open(); Parameters params = 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

<"1.0" encoding="utf-8"?> <LinearLayout xmlns:android="<a href="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

<manifest xmlns:android="<a href="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" > <activity android:name=".AppStart" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Main" > </activity> </application> <> <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.FLASHLIGHT" /> <uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> <uses-feature android: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查字典教程网。