Android studio编写简单的手电筒APP

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>

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。