print barcode c# Lists, Menus, and Other Views in Android

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Lists, Menus, and Other Views
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changeButton2setOnClickListener(new ButtonOnClickListener() { public void onClick(View v){ changeOption2(textView); } }); } static final String[] Months = new String[]{ "January","February","March","April","May","June","July","August", "September","October","November","December" }; public void changeOption(AutoCompleteTextView text){ if (textgetHeight()==100){ textsetHeight(30); } else{ textsetHeight(100); } } public void changeOption2(AutoCompleteTextView text){ textsetTextColor(ColorRED); } }
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Add an Intent Filter
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The last thing you need to do before you can run this application is to set up the Intent Filter in AndroidManifestxml You will then be able to call that Intent from the Menu shown earlier in Figure 8-1 The code for the Intent Filter should look as follows:
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<activity android:name="AutoComplete" android:label="AutoComplete"> <intent-filter> <action android:name="androidintentactionMAIN" /> <category android:name="androidintentcategoryLAUNCHER" /> </intent-filter> </activity>
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Here is your completed AndroidManifestxml file for this project:
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< xml version="10" encoding="utf-8" > <manifest xmlns:android=http://schemasandroidcom/apk/res/android package="android_programmers_guideAndroidViews">
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<application android:icon="@drawable/icon"> <activity android:name="AndroidViews" android:label="@string/app_name"> <intent-filter> <action android:name="androidintentactionMAIN" /> <category android:name="androidintentcategoryLAUNCHER" /> </intent-filter> </activity> <activity android:name="AutoComplete" android:label="AutoComplete"> <intent-filter> <action android:name="androidintentactionMAIN" /> <category android:name="androidintentcategoryLAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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Handling the Intent Call
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With AndroidManifestxml complete, add the following function to AndroidViewsjava:
public void showAutoComplete(){ Intent autocomplete = new Intent(this, AutoCompleteclass); startActivity(autocomplete); }
When called from your select/case statement, this function will open your autocomplete Activity Edit the case 0 of the select statement to let it call the new function:
case 0: showAutoComplete(); return true;
Run the application in the Android Emulator When the main Activity is launched, click the Menu Button, and you should see the menu shown earlier in Figure 8-1 Click the AutoComplete menu item Clicking the AutoComplete Button menu item should bring up your autocomplete Activity, shown next
8:
Lists, Menus, and Other Views
To test the AutoCompleteTextView, begin typing the word January After you type a few characters, you should see the word January appear under the text box, as shown in the following illustration
Android: A Programmer s Guide
Next, click the Change Layout Button, the result of which should be an expanded text entry box similar to that shown in the following illustration
Now click the Change Text Color Button and type some text, as shown next
8:
Lists, Menus, and Other Views
The following sections give you the supporting code for implementing the remaining five Views in your project
Button
Take a look at the following code This code represents four files, AndroidManifestxml, Buttonxml, testButtonjava, and AndroidViewsjava Add the code in these files to your existing AndroidViews Activity
CAUTION
If you have not followed this chapter from the beginning, you may have trouble implementing this code To make sure you are getting the full project, follow this chapter from the beginning
AndroidManifestxml
< xml version="10" encoding="utf-8" > <manifest xmlns:android=http://schemasandroidcom/apk/res/android package="android_programmers_guideAndroidViews" <application android:icon="@drawable/icon"> <activity android:name="AndroidViews" android:label="@string/app_name"> <intent-filter> <action android:name="androidintentactionMAIN" /> <category android:name="androidintentcategoryLAUNCHER" /> </intent-filter> </activity> <activity android:name="AutoComplete" android:label="AutoComplete"> <intent-filter> <action android:name="androidintentactionMAIN" /> <category android:name="androidintentcategoryLAUNCHER"/> </intent-filter> </activity> <activity android:name="testButton" android:label="TestButton"> <intent-filter> <action android:name="androidintentactionMAIN" /> <category android:name="androidintentcategoryLAUNCHER"/> </intent-filter> </activity> </application> </manifest>
Buttonxml
< xml version="10" encoding="utf-8" > <LinearLayout xmlns:android=http://schemasandroidcom/apk/res/android android:orientation="vertical" android:layout_width="fill_parent"
Android: A Programmer s Guide
android:layout_height="fill_parent"> <Button android:id="@+id/testButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="This is the test Button"/> <Button android:id="@+id/layoutButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Change Layout"/> <Button android:id="@+id/textColorButton" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Change Text Color"/> </LinearLayout>
testButtonjava
package android_programmers_guideAndroidViews; import androidappActivity; import androidosBundle; import androidviewView; import androidwidgetButton; import androidgraphicsColor; public class testButton extends Activity { @Override public void onCreate(Bundle icicle) { superonCreate(icicle); setContentView(RlayoutButton); final Button Button = (Button) findViewById(RidtestButton); final Button changeButton = (Button)findViewById(RidlayoutButton); changeButtonsetOnClickListener(new ButtonOnClickListener() { public void onClick(View v){ changeOption(Button); } }); final Button changeButton2 = (Button) findViewById(RidtextColorButton); changeButton2setOnClickListener(new ButtonOnClickListener() { public void onClick(View v){ changeOption2(Button); } }); } public void changeOption(Button Button){ if (ButtongetHeight()==100){ ButtonsetHeight(30); }
8:
Lists, Menus, and Other Views
else{ ButtonsetHeight(100); } } public void changeOption2(Button Button){ ButtonsetTextColor(ColorRED); } }
AndroidViewsjava
package android_programmers_guideAndroidViews; import import import import androidappActivity; androidosBundle; androidviewMenu; androidcontentIntent;
public class AndroidViews extends Activity { /** Called when the Activity is first created */ @Override public void onCreate(Bundle icicle) { superonCreate(icicle); setContentView(Rlayoutmain); } @Override public boolean onCreateOptionsMenu(Menu menu) { superonCreateOptionsMenu(menu); menuadd(0, 0, "AutoComplete"); menuadd(0, 1, "Button"); menuadd(0, 2, "CheckBox"); menuadd(0, 3, "EditText"); menuadd(0, 4, "RadioGroup"); menuadd(0, 5, "Spinner"); return true; } @Override public boolean onOptionsItemSelected(MenuItem item){ switch (itemgetId()) { case 0: showAutoComplete(); return true; case 1: showButton(); return true;
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