本文共 5158 字,大约阅读时间需要 17 分钟。
转自:http://18767136122.iteye.com/blog/2096095
1、图片旋转
- Bitmap bitmapOrg = BitmapFactory.decodeResource(this.getContext().getResources(), R.drawable.moon);
- Matrix matrix = new Matrix();
- matrix.postRotate(-90);
-
- Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
- bitmapOrg.getWidth(), bitmapOrg.getHeight(), matrix, true);
- BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
2、获取手机号码 -
-
- TelephonyManager tm = (TelephonyManager)
-
-
- activity.getSystemService(Context.TELEPHONY_SERVICE);
-
-
-
- String phoneId = tm.getLine1Number();
-
-
- <uses-permission
- android:name="android.permission.READ_PHONE_STATE" />
-
-
3.格式化string.xml 中的字符串 -
- <string name="my_text">Thanks for visiting %s. You age is %d!</string>
-
-
-
- String.format(getString(R.string.my_text), "oschina", 33);
4、android设置全屏的方法 A.在java代码中设置 -
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
- WindowManager.LayoutParams.FLAG_FULLSCREEN);
B、在AndroidManifest.xml中配置 - <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、设置Activity为Dialog的形式 在AndroidManifest.xml中配置Activity节点是配置theme如下: - android:theme="@android:style/Theme.Dialog"
6、检查当前网络是否连上 - 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 增加权限: - <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
7、检测某个Intent是否有效 - 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 拨打电话 - 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中发送Email - Intent i = new Intent(Intent.ACTION_SEND);
-
- i.setType("message/rfc822") ;
- i.putExtra(Intent.EXTRA_EMAIL, new String[]{ "test@gmail.com","test@163.com});
- 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中打开浏览器 - Intent viewIntent = new
- Intent("android.intent.action.VIEW",Uri.parse("http://vaiyanzi.cnblogs.com"));
-
- startActivity(viewIntent);
11、android 获取设备唯一标识码 - String android_id = Secure.getString(getContext().getContentResolver(), Secure.ANDROID_ID);
12、android中获取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获取存储卡路径以及使用情况 -
- File sdcardDir=Environment.getExternalStorageDirectory();
-
- StatFs statFs=new StatFs(sdcardDir.getPath());
-
- Long blockSize=statFs.getBlockSize();
-
- Long totalBlocks=statFs.getBlockCount();
-
- Long availableBlocks=statFs.getAvailableBlocks();
14 android中添加新的联系人 - 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、查看电池使用情况 - Intent intentBatteryUsage = new Intent(Intent.ACTION_POWER_USAGE_SUMMARY);
- startActivity(intentBatteryUsage);
16、获取进程号 - 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);
- }
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