Chapter-5 on Intents:ContactPickerTester does not show the button "Pick a Contact"

sunilm12 · March 23rd, 2009, 01:24 PM

Hi,
I am was trying to run the example from the chapter 5 on Intents... The created the ContactPicker and ContactPckerTester activities. Everything looks ok - compiling, running but I am not sure what to look for. The first activity that gets invoked is "ContactPickerTester" and rightly so , since the manifest defines the intent filter for it as action.MAIN and category.LAUNCHER.

However, it does not do anything after launching activity. I do not see the button to click "Pick Contact" ( the book says "Pick a Contact"). On debug mode , my control gets into a code outside by codebase after it reaches the
button.setOnClickListener(new OnClickListener() ..

Kindly explain to me what is happening?. I have coded both the contactpicker and contactPickerTest and I am convinced that I am passing the correct Intent. However I do not see the what is shown in the figure 5-1.

I am very confused.. thanks a ton for any help..

The full code for the ContactPickerTester.java is:

public

class ContentPickerTester extends Activity {
publicstaticfinalintPICK_CONTACT =1;
/**Calledwhentheactivityisfirstcreated.*/

@Override

publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contentpickertester);
Button button = (Button)findViewById(R.id.pick_content_button);
if (button== null)
System.exit(1);
button.setOnClickListener(new OnClickListener(){
publicvoid onClick(View _view) {
Intent intent = new Intent(Intent.ACTION_PICK,Uri.parse("content://contacts/"));
startActivityForResult(intent,PICK_CONTACT);
}
});
}
@Override

protectedvoid onActivityResult(int reqCode, int resCode, Intent data){
//public void OnActivityResult(int reqCode, int resCode, Intent data){

super.onActivityResult(reqCode, resCode, data);
switch(reqCode){
case (PICK_CONTACT):
if (resCode == Activity.RESULT_OK){
Uri ContactData = data.getData();
Cursor c = managedQuery(ContactData, null, null, null, null);
c.moveToFirst();
String name;
name = c.getString(c.getColumnIndexOrThrow(People.NAME));
TextView tv ;
tv= (TextView)findViewById(R.id.selected_contact_textView);
tv.setText(name);
}
break;
}
}
}

The manifest file:

?

xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.menonmatics.learn.contactpicker"
android:versionCode="1"
android:versionName="1.0.0">

<intent-filter>

</data>

</intent-filter>

</activity>

<intent-filter>

</intent-filter>

</activity>
</application>

<uses-permission android:name="android.permission.READ_CONTACTS"/>

</manifest>

sierawsk · April 14th, 2009, 02:57 PM

What about your contactpickertester.xml file? What does that look like?

sunilm12 · April 14th, 2009, 03:08 PM

Hi
Thanks for your response.

attached is my contactpickertest.xml. lemme know what you think: thanks in advance

Code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>

<TextView
android:id="@+id/selected_contact_textView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>

<Button
android:id="@+id/pick_content_button"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text ="Pick Contact"
/>

</LinearLayout>

sierawsk · April 15th, 2009, 11:55 AM

Well, you don't have correct values defined for layout_height of TextView or Button. Instead of "fill_parent", these should be set to "wrap_content".

I'm not exactly sure why a GIANT button isn't created. Maybe Android refuses to create a button that large. But if you correct the XML layout values, you should see the button appear.