Android 随笔记录

安卓环境变量配置

系统变量

变量名:ANDROID_HOME

变量值:D:\Android\android-sdk-windows

Path中增加:%ANDROID_HOME%\platform-tools;%ANDROID_HOME%\tools

----返回-------- @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {   if (keyCode == KeyEvent.KEYCODE_BACK     && event.getAction() == KeyEvent.ACTION_DOWN) {    back();   }   return super.onKeyDown(keyCode, event);  }

 private void back() {   Intent intent = new Intent(Msg.this, MainActivity.class);   intent.putExtra("userName", userName);   intent.putExtra("userId", userId);   startActivity(intent);   this.finish();  }

----再按一次退出--------  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {   if (keyCode == KeyEvent.KEYCODE_BACK     && event.getAction() == KeyEvent.ACTION_DOWN) {    if ((System.currentTimeMillis() - exitTime) > 2000) {// 两次操作间隔     Toast.makeText(getApplicationContext(),

R.string.exit,Toast.LENGTH_SHORT).show();     exitTime = System.currentTimeMillis();    } else {     finish();     System.exit(0);    }    return true;   }   return super.onKeyDown(keyCode, event);  } ------设置全屏--------------

第一种: AndroidManifest.xml <activity android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"../>

第二种:

 requestWindowFeature(Window.FEATURE_NO_TITLE);//设置无标题 setContentView(R.layout.activity_main); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏 ------设置只能横屏------- android:screenOrientation="landscape"

----------图片锯齿 需要注意 把  <uses-sdk         android:minSdkVersion="8"         android:targetSdkVersion="17" />  放到application底下就可以解决

-----------调用系统自带播放器  Uri uri = Uri.parse(Constants.VIDEO_PATH); // 调用系统自带的播放器  Intent playIntent = new Intent(Intent.ACTION_VIEW);

 playIntent.setDataAndType(uri, "video/mp4");  startActivity(playIntent); ----------调用安卓编写的播放器 Intent localIntent = new Intent(CarDetail.this, WeiDianYing.class);

   startActivity(localIntent); //WeiDianYing.class public class WeiDianYing extends Activity {  RelativeLayout weidianyingLayout;

 @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.h_activity_wei_dian_ying);   this.weidianyingLayout = (RelativeLayout) findViewById(R.id.weidianying);

  VideoView localVideoView = new VideoView(this);   String url = "android.resource://" + getPackageName() + "/"     + R.raw.shuangchengji;   MediaController localMediaController = new MediaController(this);

  localVideoView.setMediaController(localMediaController);   localMediaController.setMediaPlayer(localVideoView);   localVideoView.setVideoURI(Uri.parse(url));   RelativeLayout.LayoutParams localLayoutParams = new RelativeLayout.LayoutParams(     -1, -1);

  this.weidianyingLayout.setGravity(17);   this.weidianyingLayout.addView(localVideoView, localLayoutParams);   localVideoView.start();

 } }

//Weidianying.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/weidianying"     android:layout_width="fill_parent"     android:layout_height="fill_parent" >

</RelativeLayout> ------------------打开html WebView实例.loadUrl("file:///android_asset/moreinfo.html"); //设置全屏 wv.getSettings().setUseWideViewPort(true); wv.getSettings().setLoadWithOverviewMode(true);

------------------android向服务器发送url url包含json格式参数

URLEncoder.encode（参数值也就是json数据值，"UTF-8"）; 即可解决。

----------------Monkey 自动测试命令

adb shell monkey -p com.package -v 100

---------------导出logcat到文本文件

adb logcat -d > D:/logcat.txt

------------------------------------------

android 调用已安装市场，进行软件评分的功能实现

  Uri uri = Uri.parse("market://details?id="+getPackageName());   Intent intent = new Intent(Intent.ACTION_VIEW,uri);   intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);   startActivity(intent); 通过以上代码就能够列出您手机上所安装的所有应用市场（如：google player、豌豆荚、360手机助手等），让您选择。 ------------------------------------------

调用分享的代码(手机上的可以走分享的应用)

  Intent sendIntent = new Intent();   sendIntent.setAction(Intent.ACTION_SEND);   sendIntent.setType("text/*");   sendIntent.putExtra(Intent.EXTRA_TEXT, "分享的内容");   startActivity(sendIntent);

------------------------------------------