android 开发中中，经常用到的代码（转载）
android开发中中，经常用到的代码（转载）
2012-04-1912:13by宁录,56阅读,0评论,收藏,编辑
1活动管理器
权限<uses-permissionandroid:name="android.permission.GET_TASKS"/>
代码ActivityManageractivityManager=(ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
2警报管理器权限
代码AlarmManageralarmManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
3音频管理器权限
代码AudioManageraudioManager=(AudioManager)getSystemService(Context.AUDIO_SERVICE);
4剪贴板管理器权限
代码ClipboardManagerclipboardManager=(ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE);
5连接管理器权限<uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"/>
代码ConnectivityManagerconnectivityManager=(ConnectivityManager)getSystemService(Context.CONNECTIVIT
6输入法管理器权限
代码InputMethodManagerinputMethodManager=(InputMethodManager)getSystemService(Context.INPUT_METHOD_S)
7键盘管理器权限
代码KeyguardManagerkeyguardManager=(KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
8布局解压器管理器权限
代码LayoutInflaterlayoutInflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9位置管理器权限
代码LocationManagerlocationManager=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
10通知管理器权限
代码NotificationManagernotificationManager=(NotificationManager)getSystemService(Context.NOTIFICATIO)
11电源管理器权限<uses-permissionandroid:name="android.permission.DEVICE_POWER"/>
代码PowerManagerpowerManager=(PowerManager)getSystemService(Context.POWER_SERVICE);
12搜索管理器权限
代码SearchManagersearchManager=(SearchManager)getSystemService(Context.SEARCH_SERVICE);
13传感器管理器权限
代码SensorManagersensorManager=(SensorManager)getSystemService(Context.SENSOR_SERVICE);
14电话管理器权限<uses-permissionandroid:name="android.permission.READ_PHONE_STATE"/>
代码TelephonyManagertelephonyManager=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
15振动器权限<uses-permissionandroid:name="android.permission.VIBRATE"/>
代码Vibratorvibrator=(Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
16墙纸权限<uses-permissionandroid:name="android.permission.SET_WALLPAPER"/>
代码WallpaperServicewallpaperService=(WallpaperService)getSystemService(Context.WALLPAPER_SERVICE);
17Wi-Fi管理器权限<uses-permissionandroid:name="android.permission.ACCESS_WIFI_STATE"/>
代码WifiManagerwifiManager=(WifiManager)getSystemService(Context.WIFI_SERVICE);
18窗口管理器权限
代码WindowManagerwindowManager=(WindowManager)getSystemService(Context.WINDOW_SERVICE);
19获取用户android手机机器码和手机号
TelephonyManagertm=(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
Stringimei=tm.getDeviceId();//获取机器码
Stringtel=tm.getLine1Number();//获取手机号
20设置为横屏
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
21无标题栏、全屏
//无标题栏
requestWindowFeature(Window.FEATURE_NO_TITLE);//要在setcontentView之前哦
//全屏模式
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
22获取屏幕宽高
DisplayMetricsdm=newDisplayMetrics();
//获取窗口属性
getWindowManager().getDefaultDisplay().getMetrics(dm);
intscreenWidth=dm.widthPixels;//320
intscreenHeight=dm.heightPixels;//480
23使用样式表
在res/values下面新建一个XML文件style.xml，然后写下如下代码
<?xmlversion="1.0"encoding="utf-8"?>
<resources>
<stylename="style1">
<itemname="android:textSize">18sp</item>
<itemname="android:textColor">#EC9237</item>
</style>
<stylename="style2"><itemname="android:textSize">10sp</item>
<itemname="android:textColor">#FF9237</item>
</style>
</resources>
使用：
<TextView
style="@style/style1"//调用style
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="样式1"
android:id="@+id/Tv1">
</TextView>
24使用布局文件，切换布局
建立两个布局文件
在事件里面写代码
@Override
publicvoidonClick(Viewv){
helllo.this.setContentView(R.layout.layout2);
ButtontempBtn=(Button)findViewById(R.id.btn_click1);
tempBtn.setOnClickListener(newButton.OnClickListener(){
@Override
publicvoidonClick(Viewv){
helllo.this.setContentView(R.layout.xxx);
}
});
=========================================================================
1.Intent用法
2010-04-2712:09
Intentit=newIntent(Activity.Main.this,Activity2.class);
startActivity(it);
2.向下一个Activity传递数据（使用Bundle和Intent.putExtras）
Intentit=newIntent(Activity.Main.this,Activity2.class);
Bundlebundle=newBundle();
bundle.putString("name","ThisisfromMainActivity!");
it.putExtras(bundle);//it.putExtra(“test”,"shuju”);
startActivity(it);//startActivityForResult(it,REQUEST_CODE);
对于数据的获取可以采用：
Bundlebundle=getIntent().getExtras();
Stringname=bundle.getString("name");
3.向上一个Activity返回结果（使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动的Activity）
Intentintent=getIntent();
Bundlebundle2=newBundle();
bundle2.putString("name","ThisisfromShowMsg!");
intent.putExtras(bundle2);
setResult(RESULT_OK,intent);
4.回调上一个Activity的结果处理函数（onActivityResult）
@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
//TODOAuto-generatedmethodstub
super.onActivityResult(requestCode,resultCode,data);
if(requestCode==REQUEST_CODE){
if(resultCode==RESULT_CANCELED)
setTitle("cancle");
elseif(resultCode==RESULT_OK){
Stringtemp=null;
Bundlebundle=data.getExtras();
if(bundle!=null)temp=bundle.getString("name");
setTitle(temp);
}
}
}
显示网页
1.Uriuri=Uri.parse("http://google.com");
2.Intentit=newIntent(Intent.ACTION_VIEW,uri);
3.startActivity(it);
显示地图
1.Uriuri=Uri.parse("geo:38.899533,-77.036476");
2.Intentit=newIntent(Intent.ACTION_VIEW,uri);
3.startActivity(it);
4.//其他geoURI範例
5.//geo:latitude,longitude
6.//geo:latitude,longitude?z=zoom
7.//geo:0,0?q=my+street+address
8.//geo:0,0?q=business+near+city
9.//google.streetview:cbll=lat,lng&cbp=1,yaw,,pitch,zoom&mz=mapZoom
路径规划
1.Uriuri=Uri.parse("http://maps.google.com/maps?f=d&saddr=startLatstartLng&daddr=endLatendLng&hl=en");
2.Intentit=newIntent(Intent.ACTION_VIEW,uri);
3.startActivity(it);
4.//wherestartLat,startLng,endLat,endLngarealongwith6decimalslike:50.123456
打电话
1.//叫出拨号程序
2.Uriuri=Uri.parse("tel:0800000123");
3.Intentit=newIntent(Intent.ACTION_DIAL,uri);
4.startActivity(it);
1.//直接打电话出去
2.Uriuri=Uri.parse("tel:0800000123");
3.Intentit=newIntent(Intent.ACTION_CALL,uri);
4.startActivity(it);
5.//用這個，要在AndroidManifest.xml中，加上
6.//<uses-permissionid="android.permission.CALL_PHONE"/>
传送SMS/MMS
1.//调用短信程序
2.Intentit=newIntent(Intent.ACTION_VIEW,uri);
3.it.putExtra("sms_body","TheSMStext");
4.it.setType("vnd.android-dir/mms-sms");
5.startActivity(it);
1.//传送消息
2.Uriuri=Uri.parse("smsto://0800000123");
3.Intentit=newIntent(Intent.ACTION_SENDTO,uri);
4.it.putExtra("sms_body","TheSMStext");
5.startActivity(it);
1.//传送MMS
2.Uriuri=Uri.parse("content://media/external/images/media/23");
3.Intentit=newIntent(Intent.ACTION_SEND);
4.it.putExtra("sms_body","sometext");
5.it.putExtra(Intent.EXTRA_STREAM,uri);
6.it.setType("image/png");
7.startActivity(it);
传送Email
1.Uriuri=Uri.parse("mailto:[email protected]");
2.Intentit=newIntent(Intent.ACTION_SENDTO,uri);
3.startActivity(it);
1.Intentit=newIntent(Intent.ACTION_SEND);
2.it.putExtra(Intent.EXTRA_EMAIL,"[email protected]");
3.it.putExtra(Intent.EXTRA_TEXT,"Theemailbodytext");
4.it.setType("text/plain");
5.startActivity(Intent.createChooser(it,"ChooseEmailClient"));
1.Intentit=newIntent(Intent.ACTION_SEND);
2.String[]tos={"[email protected]"};
3.String[]ccs={"[email protected]"};
4.it.putExtra(Intent.EXTRA_EMAIL,tos);
5.it.putExtra(Intent.EXTRA_CC,ccs);
6.it.putExtra(Intent.EXTRA_TEXT,"Theemailbodytext");
7.it.putExtra(Intent.EXTRA_SUBJECT,"Theemailsubjecttext");
8.it.setType("message/rfc822");
9.startActivity(Intent.createChooser(it,"ChooseEmailClient"));
1.//传送附件
2.Intentit=newIntent(Intent.ACTION_SEND);
3.it.putExtra(Intent.EXTRA_SUBJECT,"Theemailsubjecttext");
4.it.putExtra(Intent.EXTRA_STREAM,"file:///sdcard/mysong.mp3");
5.sendIntent.setType("audio/mp3");
6.startActivity(Intent.createChooser(it,"ChooseEmailClient"));
播放多媒体
Uriuri=Uri.parse("file:///sdcard/song.mp3");
Intentit=newIntent(Intent.ACTION_VIEW,uri);
it.setType("audio/mp3");
startActivity(it);
Uriuri=Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI,"1");
Intentit=newIntent(Intent.ACTION_VIEW,uri);
startActivity(it);
Market相关
1.//寻找某个应用
2.Uriuri=Uri.parse("market://search?q=pname:pkg_name");
3.Intentit=newIntent(Intent.ACTION_VIEW,uri);
4.startActivity(it);
5.//wherepkg_nameisthefullpackagepathforanapplication
1.//显示某个应用的相关信息
2.Uriuri=Uri.parse("market://details?id=app_id");
3.Intentit=newIntent(Intent.ACTION_VIEW,uri);
4.startActivity(it);
5.//whereapp_idistheapplicationID,findtheID
6.//byclickingonyourapplicationonMarkethome
7.//page,andnoticetheIDfromtheaddressbar
Uninstall应用程序
1.Uriuri=Uri.fromParts("package",strPackageName,null);
2.Intentit=newIntent(Intent.ACTION_DELETE,uri);
3.startActivity(it);
===============================================================================
1调用浏览器载入某网址
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Uriuri=Uri.parse("http://www.baidu.com");
Intentit=newIntent(Intent.ACTION_VIEW,uri);
startActivity(it);
2Broadcast接收系统广播的intent监控应用程序包的安装删除
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publicclassgetBroadcastextendsBroadcastReceiver{
@Override
publicvoidonReceive(Contextcontext,Intentintent){
if(Intent.ACTION_PACKAGE_ADDED.equals(intent.getAction())){
Toast.makeText(context,"有应用被添加",Toast.LENGTH_LONG).show();
}
elseif(Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())){
Toast.makeText(context,"有应用被删除",Toast.LENGTH_LONG).show();
}
elseif(Intent.ACTION_PACKAGE_REPLACED.equals(intent.getAction())){
Toast.makeText(context,"有应用被替换",Toast.LENGTH_LONG).show();
}
elseif(Intent.ACTION_CAMERA_BUTTON.equals(intent.getAction())){
Toast.makeText(context,"按键",Toast.LENGTH_LONG).show();
}
}
}
需要声明的权限如下AndroidManifest.xml
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<?xmlversion="1.0"encoding="utf-8"?>
<manifestxmlns:android="http://schemas.android.com/apk/res/android"
package="zy.Broadcast"
android:versionCode="1"
android:versionname="1.0">
<applicationandroid:icon="@drawable/icon"android:label="@string/app_name">
<activityandroid:name=".Broadcast"
android:label="@string/app_name">
<intent-filter>
<actionandroid:name="android.intent.action.MAIN"/>
<categoryandroid:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<receiverandroid:name="getBroadcast"android:enabled="true">
<intent-filter>
<actionandroid:name="android.intent.action.PACKAGE_ADDED"></action>
<!--<actionandroid:name="android.intent.action.PACKAGE_CHANGED"></action>-->
<actionandroid:name="android.intent.action.PACKAGE_REMOVED"></action>
<actionandroid:name="android.intent.action.PACKAGE_REPLACED"></action>
<!--<actionandroid:name="android.intent.action.PACKAGE_RESTARTED"></action>-->
<!--<actionandroid:name="android.intent.action.PACKAGE_INSTALL"></action>-->
<actionandroid:name="android.intent.action.CAMERA_BUTTON"></action>
<dataandroid:scheme="package"></data>
</intent-filter>
</receiver>
</application>
<uses-sdkandroid:minSdkVersion="3"/>
</manifest>
3使用Toast输出一个字符串
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publicvoidDisplayToast(Stringstr)
{
Toast.makeText(this,str,Toast.LENGTH_SHORT).show();
}
4把一个字符串写进文件
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publicvoidwritefile(Stringstr,Stringpath)
{
Filefile;
FileOutputStreamout;
try{
//创建文件
file=newFile(path);
file.createNewFile();
//打开文件file的OutputStream
out=newFileOutputStream(file);
StringinfoToWrite=str;
//将字符串转换成byte数组写入文件
out.write(infoToWrite.getBytes());
//关闭文件file的OutputStream
out.close();
}catch(IOExceptione){
//将出错信息打印到Logcat
DisplayToast(e.toString());
}
}
5把文件内容读出到一个字符串
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publicStringgetinfo(Stringpath)
{
Filefile;
Stringstr="";
FileInputStreamin;
try{
//打开文件file的InputStream
file=newFile(path);
in=newFileInputStream(file);
//将文件内容全部读入到byte数组
intlength=(int)file.length();
byte[]temp=newbyte[length];
in.read(temp,0,length);
//将byte数组用UTF-8编码并存入display字符串中
str=EncodingUtils.getString(temp,TEXT_ENCODING);
//关闭文件file的InputStream
in.close();
}
catch(IOExceptione){
DisplayToast(e.toString());
}
returnstr;
}
6调用Androidinstaller安装和卸载程序
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Intentintent=newIntent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(newFile("/sdcard/WorldCupTimer.apk")),"application/vnd.android.package-archive");
startActivity(intent);//安装程序
UripackageURI=Uri.parse("package:zy.dnh");
IntentuninstallIntent=newIntent(Intent.ACTION_DELETE,packageURI);
startActivity(uninstallIntent);//正常卸载程序
7结束某个进程
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activityManager.restartPackage(packageName);
8设置默认来电铃声
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publicvoidsetMyRingtone()
{
Filek=newFile("/sdcard/ShallWeTalk.mp3");//设置歌曲路径
ContentValuesvalues=newContentValues();
values.put(MediaStore.MediaColumns.DATA,k.getAbsolutePath());
values.put(MediaStore.MediaColumns.TITLE,"ShallWeTalk");
values.put(MediaStore.MediaColumns.SIZE,8474325);
values.put(MediaStore.MediaColumns.MIME_TYPE,"audio/mp3");
values.put(MediaStore.Audio.Media.ARTIST,"Madonna");
values.put(MediaStore.Audio.Media.DURATION,230);
values.put(MediaStore.Audio.Media.IS_RINGTONE,true);
values.put(MediaStore.Audio.Media.IS_NOTIFICATION,false);
values.put(MediaStore.Audio.Media.IS_ALARM,false);
values.put(MediaStore.Audio.Media.IS_MUSIC,false);
//Insertitintothedatabase
Uriuri=MediaStore.Audio.Media.getContentUriForPath(k.getAbsolutePath());
UrinewUri=this.getContentResolver().insert(uri,values);
RingtoneManager.setActualDefaultRingtoneUri(this,RingtoneManager.TYPE_RINGTONE,newUri);
;}
需要的权限
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<uses-permissionandroid:name="android.permission.WRITE_SETTINGS"></uses-permission>