lssjzmn安卓手电筒源码.doc

注意：
1. 不带图标资源，可以自己画一个
2. 编译平台为Eclipse 最低安卓版本为v4.0
3. 工程源码下载地址：

第一部分：java源码(共两个.java)

MainActivity.java

package com.lssjzmn.zm_flash;

import java.util.Timer;
import java.util.TimerTask;

import android.graphics.Color;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Service;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.FeatureInfo;
import android.content.pm.PackageManager;

public class MainActivity extends Activity implements SensorEventListener {

private Camera mCamera;
private Parameters param;
private ImageView mImageViewbg;
private TextView mTextView1;
private TextView mTextView2;
private TextView mTextView3;
private SensorManager mSensorManager = null;
private Sensor mSensor = null;
private Timer mTimer;
private TimerTask mTimerTask;
private Vibrator mVibrator;
private AlertDialog mdialog;
private static Boolean isFlashOn = false;
private Boolean isFalshExists = false;
private Boolean isSosOn = false;
private Boolean isTimerOff = false;
private Boolean isVibratorable = false;
private int lux, mi = 0;
private int remain = 2, counter = 2;
private long mExitTime = 0;
private long mFlashPeriod = 600;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);

HomeKeyExit homeKeyExitReceiver = new HomeKeyExit(); // 生成注册广播接收
registerReceiver(homeKeyExitReceiver, new IntentFilter(
Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
checkflash();
mCamera = Camera.open();
param = mCamera.getParameters();
mVibrator = (Vibrator) getApplication().getSystemService(
Service.VIBRATOR_SERVICE);
mSensorManager = (SensorManager) getApplication().getSystemService(
Service.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
mSensorManager.registerListener(this, mSensor,
SensorManager.SENSOR_DELAY_GAME);

// 创建对话框
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("选择闪烁速度");
// 创建选项数组
String[] options = { "快", "中(默认)", "慢" };
builder.setItems(options, dialogListener); // 设置选项
builder.setNegativeButton("确定", null);
mdialog = builder.create(); // 创建对话框

mTextView1 = (TextView) findViewById(R.id.textView);
mTextView2 = (TextView) findViewById(R.id.speeddisp);
mTextView2.setText("当前闪烁速度：默认");
mTextView3 = (TextView) findViewById(R.id.isvibratoring);
mTextView3.setText("非振动模式");
mImageViewbg = (ImageView) findViewById(R.id.backgrd);
ImageButton btnon = (ImageButton) findViewById(R.id.on);
btnon.setOnClickListener( // 匿名内层类
new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isSosOn == true) {
mTimer.cancel();
isSosOn = false;
isTimerOff = true;
}
flashOn(mCamera, param);
}
});

ImageButton btnoff = (ImageButton) findViewById(R.id.off);
btnoff.setOnClickListener( // 匿名内层类
new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isSosOn == true) {
mTimer.cancel();
isSosOn = false;
isTimerOff = true;
}
if (isFlashOn == true) {
flashOff(mCamera, param);
} else
return;
}
});

ImageButton btnvib = (ImageButton) findViewById(R.id.vibrator);
btnvib.setOnClickListener( // 匿名内层类
new View.OnClickListener() {
@Override
public void onClick(View v) {
remain = counter % 2;
if (remain == 1) {
isVibratorable = false;
counter += 1;
mTextView3.setText("非振动模式");
} else {
isVibratorable = true;
counter += 1;
mTextView3.setText("光敏感振动模式");
}
}
});

mTimer = new Timer();
mTimerTask = new sosTimerTask();
ImageButton btnsos = (ImageButton) findViewById(R.id.bntsos);
btnsos.setOnClickListener( // 匿名内层类
new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isTimerOff == true) {
mTimer = new Timer();
mTimerTask = new sosTimerTask();
isTimerOff = false;
}
if (isSosOn == false) {
isSosOn = true;
isFlashOn = true;
try {
flashOff(mCamera, param);
mTimer.schedule(mTimerTask, 0, mFlashPeriod);
switch ((int) mFlashPeriod) {
case 300:
mTextView2.setText("当前闪烁速度：快");
break;
case 600:
mTextView2.setText("当前闪烁速度：默认");
break;
case 1000:
mTextView2.setText("当前闪烁速度：慢");
break;
}
} catch (Exception e) {
Toast.makeText(MainActivity.this, "闪烁未成功！",
Toast.LENGTH_LONG).show();
}
}
}
});

}

// 对话框选项的监听对象
DialogInterface.OnClickListener dialogListener = new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int speed) {
switch (speed) {
case 0:
mFlashPeriod = 500;// 快
mTextView2.setText("当前闪烁速度：快");
break;
case 1:
mFlashPeriod = 700;// 中（默认）
mTextView2.setText("当前闪烁速度：默认");
break;
case 2:
mFlashPeriod = 1000;// 慢
mTextView2.setText("当前闪烁速度：慢");
break;
}
}
};

public void aboutApp() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("关于手电筒")
.setMessage("名称：ZM_Flash\n作者：lssjzmn\n时间：2014/4/4")
.setPositiveButton("我知道了",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialoginterface, int i) {
// Do nothing
}
}).show();
}

public void checkflash() {
PackageManager pm = this.getPackageManager();
FeatureInfo[] features = pm.getSystemAvailableFeatures();
for (FeatureInfo f : features) {
if (PackageManager.FEATURE_CAMERA_FLASH.equals(f.name)) {
isFalshExists = true;
return;
}
}
if (!isFalshExists == true) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("提醒")
.setMessage("没有找到可用的闪光灯设备\n确认并退出程序")
.setPositiveButton("确认",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialoginterface, int i) {
finish();
System.exit(0);
}
}).show();
} else {
return;
}
}

public void flashOff(Camera mCamera, Parameters param) {
mImageViewbg.setBackground(getResources().getDrawable(
R.drawable.flashoff));
param.setFlashMode(Parameters.FLASH_MODE_OFF);
mCamera.setParameters(param);
mCamera.stopPreview();
isFlashOn = false;
}

public void flashOn(Camera mCamera, Parameters param) {
mImageViewbg.setBackground(getResources().getDrawable(
R.drawable.flashon));
param.setFlashMode(Parameters.FLASH_MODE_TORCH);// 只用FLASH_MODE_TORCH
// mImageViewbg.setBackgroundColor(Color.parseColor("#333333"));
mCamera.setParameters(param);
mCamera.startPreview();
isFlashOn = true;
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if ((System.currentTimeMillis() - mExitTime) > 2000) {
Toast.makeText(this, "再按一次退出手电筒", Toast.LENGTH_SHORT).show();
mExitTime = System.currentTimeMillis();
} else {
finish();
System.exit(0);
}
return true;
default:
break;
}
return super.onKeyDown(keyCode, event);
}

@Override
protected void onDestroy() {
super.onDestroy();
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
mTimer.cancel();
}

@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
}

@Override
public void onSensorChanged(SensorEvent event) {
lux = (int) event.values[0];
mTextView1.setText("光照度Lux= " + lux + "/10000");
if (isVibratorable == true)
vibrator();
}

public void vibrator() {
if (lux <= 20)
mVibrator.vibrate(new long[] { 300, 500 }, -1);
}

public void speed(View v) {
if (isFlashOn)
flashOff(mCamera, param);
mdialog.show();
}

public void exit(View v) {
finish();
System.exit(0);
}

public void about(View v) {
aboutApp();
}

class sosTimerTask extends TimerTask {
@Override
public void run() {
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
flashOn(mCamera, param);
for (int i = 0; i < 1000; i++) {// useless
mi += i;
}
flashOff(mCamera, param);
}

});
}
}
}

HomeKeyExit.java

package com.lssjzmn.zm_flash;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

class HomeKeyExit extends BroadcastReceiver {

static final String SYSTEM_REASON = "reason";
static final String SYSTEM_HOME_KEY = "homekey";//home key
static final String SYSTEM_RECENT_APPS = "recentapps";//long home key

@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
String reason = intent.getStringExtra(SYSTEM_REASON);
if (reason != null) {
if (reason.equals(SYSTEM_HOME_KEY)) {
// home key
System.exit(0);
} else if (reason.equals(SYSTEM_RECENT_APPS)) {
// long home key
}
}
}
}
}

第二部分：界面 activity_main.xml文件

<RelativeLayout xmlns:android="
xmlns:tools="
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:background="#000000"
android:id="@+id/about"
android:onClick="about">

<ImageView
android:id="@+id/backgrd"
android:layout_width="600dp"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true" />

<ImageButton
android:id="@+id/on"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="62dp"
android:layout_marginLeft="42dp"
android:src="@drawable/on"
style="?android:attr/borderlessButtonStyle"/>

<ImageButton
android:id="@+id/off"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/on"
android:layout_alignParentRight="true"
android:layout_marginRight="42dp"
android:src="@drawable/off"
style="?android:attr/borderlessButtonStyle"/>

<ImageButton
android:id="@+id/exit"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/exit"
android:onClick="exit"
style="?android:attr/borderlessButtonStyle"/>

<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:textColor="#ffffff"/>

<ImageButton
android:id="@+id/bntsos"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/exit"
android:layout_alignParentRight="true"
android:src="@android:drawable/ic_lock_silent_mode_off"
style="?android:attr/borderlessButtonStyle" />

<ImageButton
android:id="@+id/vibrator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/bntsos"
android:layout_alignLeft="@+id/off"
android:layout_marginLeft="22dp"
android:onClick="vibrator"
android:src="@android:drawable/ic_menu_always_landscape_portrait"
style="?android:attr/borderlessButtonStyle"/>

<ImageButton
android:id="@+id/flashspeed"
style="?android:attr/borderlessButtonStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/vibrator"
android:layout_marginLeft="26dp"
android:layout_toRightOf="@+id/on"
android:onClick="speed"
android:src="@android:drawable/ic_menu_manage" />

<TextView
android:id="@+id/speeddisp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/off"
android:layout_alignParentBottom="true"
android:textColor="#ffffff" />

<TextView
android:id="@+id/isvibratoring"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/exit"
android:layout_marginBottom="13dp"
android:layout_marginLeft="21dp"
android:layout_toRightOf="@+id/exit"
android:textColor="#ffffff"/>

</RelativeLayout>

第三部分：Mainfest.xml文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="
package="com.lssjzmn.zm_flash"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-permission android:name="android.permission.VIBRATE"/>

<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-feature android:name="an