Android studio编写简单的手电筒APP

概述很不错的手电筒APP，分享给大家，希望大家喜欢。1.Java代码    

很不错的手电筒APP，分享给大家，希望大家喜欢。

1. Java代码    

package com.example.goo.gfire; import androID.app.Activity;import androID.harDWare.Camera;import androID.harDWare.Camera.Parameters;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.button;  public class FireActivity extends Activity {  private button button;  private Camera camera = Camera.open();  private Parameters parameters;  private boolean islight=true;   public voID onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentVIEw(R.layout.activity_fire);   button = (button) this.findVIEwByID(R.ID.bn);   button.setonClickListener(new VIEw.OnClickListener() {     @OverrIDe     public voID onClick(VIEw v) {      if (islight) {        camera.startPrevIEw();        parameters = camera.getParameters();        parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);        camera.setParameters(parameters);        islight = false        ;        button.setText("关");      } else {        parameters = camera.getParameters();        parameters.setFlashMode(Parameters.FLASH_MODE_OFF);        camera.setParameters(parameters);        islight = true;        button.setText("开");      }     }    });  }}

2. FireActivity.java

package com.example.goo.gfire; import androID.app.Activity;import androID.harDWare.Camera;import androID.harDWare.Camera.Parameters;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.button;  public class FireActivity extends Activity {  private button button;  private Camera camera = Camera.open();  private Parameters parameters;  private boolean islight=true;   public voID onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentVIEw(R.layout.activity_fire);   button = (button) this.findVIEwByID(R.ID.bn);   button.setonClickListener(new VIEw.OnClickListener() {     @OverrIDe     public voID onClick(VIEw v) {      if (islight) {        camera.startPrevIEw();        parameters = camera.getParameters();        parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);        camera.setParameters(parameters);        islight = false        ;        button.setText("关");      } else {        parameters = camera.getParameters();        parameters.setFlashMode(Parameters.FLASH_MODE_OFF);        camera.setParameters(parameters);        islight = true;        button.setText("开");      }     }    });  }}

3. content_fire.xml

<?xml version="1.0" enCoding="utf-8"?><relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"  xmlns:app="http://schemas.androID.com/apk/res-auto"  xmlns:tools="http://schemas.androID.com/tools"  androID:layout_wIDth="match_parent"  androID:layout_height="match_parent"  androID:paddingBottom="@dimen/activity_vertical_margin"  androID:paddingleft="@dimen/activity_horizontal_margin"  androID:paddingRight="@dimen/activity_horizontal_margin"  androID:paddingtop="@dimen/activity_vertical_margin"  app:layout_behavior="@string/appbar_scrolling_vIEw_behavior"  tools:context="com.example.goo.gfire.FireActivity"  tools:showIn="@layout/activity_fire">   <TextVIEw    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:text="电筒模式"    androID:textSize="34sp"    androID:textStyle="bold"    androID:gravity="center"/>  <button    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:ID="@+ID/bn"    androID:textOff="关"    androID:textOn="开"    androID:height="400dp"    androID:layout_alignParentBottom="true"    androID:layout_centerHorizontal="true"    androID:layout_marginBottom="59dp"    androID:FontFeaturesettings="@string/auth_Google_play_services_clIEnt_facebook_display_name"    androID:textcolor="@color/common_signin_btn_dark_text_focused"    androID:textStyle="bold"    androID:textSize="100sp"    />  </relativeLayout>

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