Last exercise show how to "Get text from dynamically added view" using button with OnClickListener to include text directly while creating and adding the view. In this exercise, we add a button, named "Show All", to retrieve all dynamic added view indirectly from their parent LinearLayout, container.
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| Get child view at run-time, using getChildCount() and getChildAt(). |
package com.example.androiddynamicview;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.animation.LayoutTransition;
import android.app.Activity;
import android.content.Context;
public class MainActivity extends Activity {
EditText textIn;
Button buttonAdd;
LinearLayout container;
Button buttonShowAll;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textIn = (EditText)findViewById(R.id.textin);
buttonAdd = (Button)findViewById(R.id.add);
container = (LinearLayout)findViewById(R.id.container);
buttonAdd.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
LayoutInflater layoutInflater =
(LayoutInflater) getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View addView = layoutInflater.inflate(R.layout.row, null);
final TextView textOut = (TextView)addView.findViewById(R.id.textout);
textOut.setText(textIn.getText().toString());
Button buttonRemove = (Button)addView.findViewById(R.id.remove);
buttonRemove.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
((LinearLayout)addView.getParent()).removeView(addView);
}});
Button buttonInsert = (Button)addView.findViewById(R.id.insert);
buttonInsert.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
String text = textOut.getText().toString();
String newText = textIn.getText().toString() + text;
textIn.setText(newText);
}});
container.addView(addView, 0);
}});
LayoutTransition transition = new LayoutTransition();
container.setLayoutTransition(transition);
buttonShowAll = (Button)findViewById(R.id.showall);
buttonShowAll.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
String showallPrompt = "";
int childCount = container.getChildCount();
showallPrompt += "childCount: " + childCount + "\n\n";
for(int c=0; c<childCount; c++){
View childView = container.getChildAt(c);
TextView childTextView = (TextView)(childView.findViewById(R.id.textout));
String childTextViewText = (String)(childTextView.getText());
showallPrompt += c + ": " + childTextViewText + "\n";
}
Toast.makeText(MainActivity.this,
showallPrompt,
Toast.LENGTH_LONG).show();
}});
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://arteluzevida.blogspot.com/"
android:textStyle="bold" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="Add"/>
<EditText
android:id="@+id/textin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@id/add"/>
</RelativeLayout>
<Button
android:id="@+id/showall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Show All" />
<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>
The layout of the dynamic view, /res/layout/row.xml, refer last exercise.
Download the files.
