How to Understand Android program running performance optimization

I. Use logcat output with cautionIf your application always outputs logs in the background. I or log. d content, in addition to increasing system overhead, affects the overall efficiency of your application, especially the continuous output of a lot

Android autocompletetextview usage

Package Com. turboradio. googlesdk; Import Android. App. activity; Import Android. OS. Bundle; Import Android. widget. arrayadapter; Import Android. widget. autocompletetextview; Public Class Ex_4_13 Extends Activity { Private Static Final

Android click to jump to the page you want to display

1. to open a webpage, you can write a webview by yourself and open it in your Program . WV = (webview) findviewbyid (R. id. webview1); WV. getsettings (). setjavascriptenabled (true); WV. setscrollbarstyle (0); websettings = WV. getsettings ();

XMPP-based IM research on Android

Because the project requires an android Communication Software Based on XMPP protocol. So we started to study XMPP. The XMPP protocol uses the client-server architecture. All messages and data sent from one client to another must be forwarded by

Study on Android custom View (7)-View touch origin in XML

In XML layout, where is the touch origin of the custom View ?? This is another problem. The learning process is the process of constantly discovering and solving problems. Well, I believe everyone has a deep understanding. This time we will study

Study on Android custom View (5)-View Size

After talking about this, what is the size of the View? In this section, I will study the size of the View. Use LogCat to study how the View Size is determined. Okay. Let's get started with the subject. 1. The size of the View when new HelloView is

Android multi-touch development principle

  Android multi-touch is essentially supported by LCD drivers and programming. Currently, many well-known manufacturers such as HTC, Motorola, and Samsung can support multi-touch Multitouch technology as long as they use capacitive screen

Android custom View (6)-origin coordinate Problems in View

We have customized the View, but I have never thought of a problem: Where is the (0, 0) coordinate in the View, that is, the origin coordinate ?? Are we sometimes confused? Next we will study the origin coordinate problems in the View.   1. View

Apply for the android google map API key

1. First locate the debug keystore location: Open Eclipse ---> Windows ---> Preferences ---> Android ---> Build This is generally the path C: \ Documents ents and Settings \ Administrator \. android \ debug. keystore 2. Run Keytool-list-alias

Android quick search mobile phone file Engine

1 package com. turboradio. googlesdk;23 import java. io. File;45 import android. app. Activity;6 import android. OS. Bundle;7 import android. view. View;8 import android. widget. EditText;9 import android. widget. TextView;1011 public class Ex_4_11

Android File data storage

1 2 3 android:layout_width="fill_parent" 4 android:layout_height="fill_parent" 5 android:orientation="vertical" > 6 7 android:id="@+id/write_edit" 8 android:layout_width="fill_parent" 9

The android Application jumps to the various settings page of the system.

In the android SDK documentation, the android. provider. Settings class provides jump constants for various pages of the android system: Example: startActivity (new Intent (Settings. ACTION_WIRELESS_SETTINGS. If you want to launch the Mobile

Android TabHost dynamically modifies the icon or the title

AbHost mTabHost;/** Called when the activity is first created. * // @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); // obtain the TabHost object mTabHost =

Android map service development INSTALL_FAILED_MISSING_SHARED_LIBRARY error Solution

Android map service development INSTALL_FAILED_MISSING_SHARED_LIBRARY error Solution   In the development of the map service, such errors are generally solved in the following two situations: (most of the forums are the answers to the first

Android SMS sending program

1 package com. turboradio. googlesdk;23 import java. util. regex. Matcher;4 import java. util. regex. Pattern;56 import android. app. Activity;7 import android. app. PendingIntent;8 import android. content. Intent;9 import android. OS. Bundle;10

Android DatePickerDialog usage

  package com.turboradio;import java.text.SimpleDateFormat;import java.util.Calendar;import android.app.Activity;import android.app.DatePickerDialog;import android.os.Bundle;import android.view.View;import android.widget.DatePicker;import

Positive Solutions for Android getWidth and getMeasuredWidth

I. Many children's shoes may not understand the usage of getWidth () and getMeasuredWidth (). What are the differences between the two, there are different versions on the Internet, but most of them share the same small version, from this place Ctrl

Android RatingBar usage

1 package com.turbo; 2 3 import android.app.Activity; 4 import android.os.Bundle; 5 import android.widget.RatingBar; 6 import android.widget.Toast; 7 8 public class AndroidSeekBar extends Activity { 9 @Override10 protected void

ConnectivityManager application in Android Development

/*** Test the main management and network connection operations of ConnectivityManager.* TelephonyManager manages information related to mobile phones and carriers, and WifiManager manages information related to wifi.* To access the network status,

Android MediaPlayer (Multimedia) Method Introduction

AndroidMultimedia Learning Summary MediaPlayer Method Introduction: MediaPlayer instantiation MediaPlayer player = MediaPlayer. create (this, R. raw .&&); Player. getCurrentPosition () to get the current playback position Player. getDuration () Get

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