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本文實例總結了Android開辟經常使用經典代碼段。分享給年夜家供年夜家參考，詳細以下：
1、圖片扭轉
Bitmap bitmapOrg = BitmapFactory.decodeResource(this.getContext().getResources(), R.drawable.moon);
Matrix matrix = new Matrix();
matrix.postRotate(-90);//扭轉的角度
Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
bitmapOrg.getWidth(), bitmapOrg.getHeight(), matrix, true);
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
2、獲得手機號碼
//創立德律風治理 TelephonyManager tm = (TelephonyManager) //與手機樹立銜接 activity.getSystemService(Context.TELEPHONY_SERVICE); //獲得手機號碼 String phoneId = tm.getLine1Number(); //記得在manifest file中添加 <uses-permission android:name="android.permission.READ_PHONE_STATE" /> //法式在模仿器上沒法完成，必需銜接手機
3.格局化string.xml 中的字符串
// in strings.xml.. <string name="my_text">Thanks for visiting %s. You age is %d!</string> // and in the java code: String.format(getString(R.string.my_text), "oschina", 33);
4、android設置全屏的辦法
A.在java代碼中設置
/** 全屏設置，隱蔽窗口一切裝潢 */
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
B、在AndroidManifest.xml中設置裝備擺設
<activity android:name=".Login.NetEdit" android:label="@string/label_net_Edit"
android:screenOrientation="portrait" android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen">
<intent-filter>
<action android:name="android.intent.Net_Edit" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
5、設置Activity為Dialog的情勢
在AndroidManifest.xml中設置裝備擺設Activity節點是設置裝備擺設theme以下：
android:theme="@android:style/Theme.Dialog"
6、檢討以後收集能否連上
ConnectivityManager con=(ConnectivityManager)getSystemService(Activity.CONNECTIVITY_SERVICE); boolean wifi=con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting(); boolean internet=con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();
在AndroidManifest.xml 增長權限：
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
7、檢測某個Intent能否有用
public static boolean isIntentAvailable(Context context, String action) {
final PackageManager packageManager = context.getPackageManager();
final Intent intent = new Intent(action);
List<ResolveInfo> list =
packageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
8、android 撥打德律風
try {
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:+110"));
startActivity(intent);
} catch (Exception e) {
Log.e("SampleApp", "Failed to invoke call", e);
}
9、android中發送Email
Intent i = new Intent(Intent.ACTION_SEND);
//i.setType("text/plain"); //模仿器請應用這行
i.setType("message/rfc822") ; // 真機上應用這行
i.putExtra(Intent.EXTRA_EMAIL, new String[]{"[email protected]","[email protected]});
i.putExtra(Intent.EXTRA_SUBJECT,"subject goes here");
i.putExtra(Intent.EXTRA_TEXT,"body goes here");
startActivity(Intent.createChooser(i, "Select email application."));
10、android中翻開閱讀器
Intent viewIntent = new
Intent("android.intent.action.VIEW",Uri.parse("http://vaiyanzi.cnblogs.com"));
startActivity(viewIntent);
11、android 獲得裝備獨一標識碼
String android_id = Secure.getString(getContext().getContentResolver(), Secure.ANDROID_ID);
12、android中獲得IP地址
public String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();
enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException ex) {
Log.e(LOG_TAG, ex.toString());
}
return null;
}
13、android獲得存儲卡途徑和應用情形
/** 獲得存儲卡途徑 */ File sdcardDir=Environment.getExternalStorageDirectory(); /** StatFs 看文件體系空間應用情形 */ StatFs statFs=new StatFs(sdcardDir.getPath()); /** Block 的 size*/ Long blockSize=statFs.getBlockSize(); /** 總 Block 數目 */ Long totalBlocks=statFs.getBlockCount(); /** 已應用的 Block 數目 */ Long availableBlocks=statFs.getAvailableBlocks();
14 android中添加新的接洽人
private Uri insertContact(Context context, String name, String phone) {
ContentValues values = new ContentValues();
values.put(People.NAME, name);
Uri uri = getContentResolver().insert(People.CONTENT_URI, values);
Uri numberUri = Uri.withAppendedPath(uri, People.Phones.CONTENT_DIRECTORY);
values.clear();
values.put(Contacts.Phones.TYPE, People.Phones.TYPE_MOBILE);
values.put(People.NUMBER, phone);
getContentResolver().insert(numberUri, values);
return uri;
}
15、檢查電池應用情形
Intent intentBatteryUsage = new Intent(Intent.ACTION_POWER_USAGE_SUMMARY); startActivity(intentBatteryUsage);
16、獲得過程號
ActivityManager mActivityManager = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> mRunningProcess = mActivityManager.getRunningAppProcesses();
int i = 1;
for (ActivityManager.RunningAppProcessInfo amProcess : mRunningProcess) {
Log.e("homer Application", (i++) + " PID = " + amProcess.pid + "; processName = " + amProcess.processName);
}
願望本文所述對年夜家Android法式設計有所贊助。
