I am just starting Android development and testing the HelloAndroid tutorial. I’ve been stuck for several days. Initially, the first time I tried it, everything works fine, and then I go to the second tutorial, everything broke. Therefore, I try to return to the simplest and most original textbook and find out what is happening.
There are three main files that I edited: HelloAndroid2.java package com.example.HelloAndroid2;
import android.app.Activity;
import android.os.Bundle;
public class HelloAndroid2 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
main.xml:
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/textview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@string/hello"/>
strings.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, HelloAndroid2!</string>
<string name="app_name">HelloAndroid2</string>
</resources>
All this from the textbook.
When I run it, the console output is:
[2010-07-06 16:37:16 - HelloAndroid2] ------------------------------
[2010-07-06 16:37:16 - HelloAndroid2] Android Launch!
[2010-07-06 16:37:16 - HelloAndroid2] adb is running normally.
[2010-07-06 16:37:16 - HelloAndroid2] Performing com.example.HelloAndroid2.HelloAndroid2 activity launch
[2010-07-06 16:37:16 - HelloAndroid2] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'HelloWorld'
[2010-07-06 16:37:16 - HelloAndroid2] WARNING: Application does not specify an API level requirement!
[2010-07-06 16:37:16 - HelloAndroid2] Device API version is 8 (Android 2.2)
[2010-07-06 16:37:16 - HelloAndroid2] Uploading HelloAndroid2.apk onto device 'emulator-5554'
[2010-07-06 16:37:16 - HelloAndroid2] Installing HelloAndroid2.apk...
[2010-07-06 16:37:22 - HelloAndroid2] Success!
[2010-07-06 16:37:22 - HelloAndroid2] Starting activity com.example.HelloAndroid2.HelloAndroid2 on device
[2010-07-06 16:37:26 - HelloAndroid2] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.HelloAndroid2/.HelloAndroid2 }
So, it just gets stuck at the beginning: intention ... The emulator shows the time, date and fax that it charges. I am developing Android 2.2. I am trying to get some data from LogCat, and these are the last few lines:
07-06 20:37:25.935: INFO/AndroidRuntime(387): NOTE: attach of thread 'Binder Thread #3' failed
07-06 20:37:27.265: INFO/ActivityManager(65): Displayed activity com.example.HelloAndroid2/.HelloAndroid2: 1461 ms (total 1461 ms)
07-06 20:37:32.376: DEBUG/dalvikvm(114): GC_EXPLICIT freed 562 objects / 31672 bytes in 95ms
07-06 20:37:37.386: DEBUG/dalvikvm(197): GC_EXPLICIT freed 82 objects / 7592 bytes in 87ms
07-06 20:37:42.386: DEBUG/dalvikvm(250): GC_EXPLICIT freed 26 objects / 1120 bytes in 102ms
07-06 20:38:10.437: DEBUG/SntpClient(65): request time failed: java.net.SocketException: Address family not supported by protocol
, , HelloAndroid - . , .
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.HelloAndroid2"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".HelloAndroid2"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>