【开源中国 APP 全新上线】“动弹” 回归、集成大模型对话、畅读技术报告”
package com.example.light; import android.app.Activity; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.os.Bundle; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity { private boolean isOpen = false; private Camera mCamera; private TextView tv; private Button btn; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn = (Button) findViewById(R.id.btn_switch); tv = (TextView) findViewById(R.id.txt_show); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(!isOpen){ mCamera = Camera.open(); Camera.Parameters p = mCamera.getParameters(); p.setFlashMode(Parameters.FLASH_MODE_TORCH); mCamera.setParameters(p); mCamera.startPreview(); isOpen = true; tv.setText("电筒已经开启"); }else{ Camera.Parameters p = mCamera.getParameters(); p.setFlashMode(Parameters.FLASH_MODE_OFF); mCamera.setParameters(p); mCamera.stopPreview(); mCamera.release(); isOpen = false; tv.setText("电筒已经关闭"); } } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } }
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.light" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" android:label="@string/title_activity_main" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.CAMERA"/> <uses-permission android:name="android.permission.FLASHLIGHT"/> </manifest>