Android实用的代码片段 常用代码总结

  • Z时代
  • 2024-01-10
  • 分类：综合

1：查看是否有存储卡插入

String status=Environment.getExternalStorageState();
if(status.equals(Enviroment.MEDIA_MOUNTED))
{
   说明有SD卡插入
}

2：让某个Activity透明

OnCreate中不设Layout this.setTheme(R.style.Theme_Transparent);

以下是Theme_Transparent的定义（注意transparent_bg是一副透明的图片）


3：在屏幕元素中设置句柄

使用Activity.findViewById来取得屏幕上的元素的句柄. 使用该句柄您可以设置或获取任何该对象外露的值.

TextView msgTextView = (TextView)findViewById(R.id.msg);
   msgTextView.setText(R.string.push_me);

4：发送短信

 String body="this is mms demo";
           Intent mmsintent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts("smsto", number, null));
           mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);
           mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, true);
           mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, true);
            startActivity(mmsintent);

5：发送彩信

    
StringBuilder sb = new StringBuilder();
            sb.append("file://");
            sb.append(fd.getAbsoluteFile());
            Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts("mmsto", number, null));
            // Below extra datas are all optional.
            intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_SUBJECT, subject);
            intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);
            intent.putExtra(Messaging.KEY_ACTION_SENDTO_CONTENT_URI, sb.toString());
            intent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, composeMode);
            intent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, exitOnSent);
            startActivity(intent)

6：发送Mail

mime = "img/jpg";
            shareIntent.setDataAndType(Uri.fromFile(fd), mime);
            shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(fd));
            shareIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
            shareIntent.putExtra(Intent.EXTRA_TEXT, body);

7：注册一个BroadcastReceiver

registerReceiver(mMasterResetReciever, new IntentFilter("oms.action.MASTERRESET"));
private BroadcastReceiver mMasterResetReciever = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent){
            String action = intent.getAction();
            if("oms.action.MASTERRESET".equals(action)){
                RecoverDefaultConfig();
            }
        }
    }

8：定义ContentObserver，监听某个数据表

private ContentObserver mDownloadsObserver = new DownloadsChangeObserver(Downloads.CONTENT_URI);
private class DownloadsChangeObserver extends ContentObserver {
        public DownloadsChangeObserver(Uri uri) {
            super(new Handler());
        }
        @Override
        public void onChange(boolean selfChange) {｝  
        }

9：获得 手机UA

public String getUserAgent()
    {
           String user_agent = ProductProperties.get(ProductProperties.USER_AGENT_KEY, null);
            return user_agent;
    }

10：清空手机上Cookie

CookieSyncManager.createInstance(getApplicationContext());
        CookieManager.getInstance().removeAllCookie();11：建立GPRS连接

 //Dial the GPRS link.

    private boolean openDataConnection() {

        // Set up data connection.

        DataConnection conn = DataConnection.getInstance();    

            if (connectMode == 0) {

                ret = conn.openConnection(mContext, "cmwap", "cmwap", "cmwap");

            } else {

                ret = conn.openConnection(mContext, "cmnet", "", "");

            }

    }

以上是 Android实用的代码片段 常用代码总结 的全部内容， 来源链接： utcz.com/z/315575.html

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