Android :: Scroll To Last Line Of Table Layout Within Scroll View

Jun 21, 2010

I want to have a dynamic table, with rows added over time as a result of user interaction, using a TableLayout inside a ScrollView. This works fine, but when I want to scroll to the end of the table using fullScroll(), it always leaves out the last line; that is, it scrolls so that the one before the last one is visible. The last line is visible when scrolling manually, and the scrollbar is correct too.I'm of course open to suggestions as to how to make a better layout out of this; but I'm specifically interested in understanding why fullScroll() behaves that way. Should I give it a different parameter, or use something else altogether? Or does it do that because the newly added line isn't yet visible somehow? (if so, how can I solve that?) Or did I miss some other obvious thing?The following code replicates the problem: TestActivity.java:
package com.example.android.tests;
import java.util.Random;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ScrollView;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
public class TestActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
((Button) findViewById(R.id.AddRow)).setOnClickListener(new View.OnClickListener() { public void onClick(View v) {
Random rnd = new Random();
TableRow nr = new TableRow(v.getContext());
for (int c=0; c<3; c++) {
TextView nv = new TextView(v.getContext());
nv.setText(Integer.toString(rnd.nextInt(20)-10));
nr.addView(nv);
}((TableLayout) findViewById(R.id.Table)).addView(nr);
// Scrolls to line before last - why?
((ScrollView) findViewById(R.id.TableScroller)).fullScroll(View.FOCUS_DOWN);
}main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:text="Add Row"
android:id="@+id/AddRow"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" />
<ScrollView
android:id="@+id/TableScroller"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@id/AddRow"
android:layout_alignParentTop="true" >
<TableLayout
android:id="@+id/Table"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="0,1,2" />
</ScrollView>
</RelativeLayout>
Edit: for reference, I implemented Romain Guy's solution as follows:In TestActivity.java, replace:
// Scrolls to line before last - why?
((ScrollView) findViewById(R.id.TableScroller)).fullScroll(View.FOCUS_DOWN);
// Enqueue the scrolling to happen after the new row has been layout
((ScrollView) findViewById(R.id.TableScroller)).post(new Runnable() {
public void run() {
((ScrollView) findViewById(R.id.TableScroller)).fullScroll(View.FOCUS_DOWN);

Android :: Scroll to last line of Table Layout within Scroll View


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import android.app.Activity;
import android.os.Bundle;
import android.text.format.Time;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.TextView;
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public final static int STATE_TIMER_PAUSED = 3;
private int mState;
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private Time data = new Time();
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private TextView lblSpacer;
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mState = MyTestApp.STATE_TIMER_RUNNING;
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}public void doNewRunClick(View v) {
public void doAddTiming(View v) {
public void reset() {
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xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/windowScroller"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
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android:layout_height="fill_parent"
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android:id="@+id/btnStartStopResume"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dip"
android:text="Start Timing"
android:textSize="40dp"
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android:onClick="doStartStopResume" />
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android:id="@+id/lblSpacer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
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android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/lblSpacer"
android:layout_alignParentLeft="true"
android:clickable="true"
android:onClick="adjustStartTime"
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android:textSize="8dp" />
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android:id="@+id/lblTimeStart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/lblTimeStartLabel"
android:layout_alignParentLeft="true"
android:clickable="true"
android:onClick="adjustStartTime"
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android:textColor="#FFFFFF"
android:textSize="26dp" />
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android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/lblSpacer"
android:layout_alignRight="@id/lblSpacer"
android:layout_marginRight="5dp"
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android:textSize="8dp" />
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android:id="@+id/lblTimeElapsed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/lblElapsedLabel"
android:layout_alignRight="@id/lblSpacer"
android:layout_marginRight="5dp"
android:textColor="#99ff66"
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android:textSize="26dp"
android:layout_marginBottom="10dip"/>
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android:onClick="doNewRunClick"
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android:layout_height="wrap_content"
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android:id="@+id/rbIntensity"
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android:layout_height="wrap_content"
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android:id="@+id/txtNotes"
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android:layout_height="wrap_content"
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android:layout_width="wrap_content"
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android:layout_below="@id/txtNotes"
android:layout_alignParentLeft="true"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
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android:id="@+id/btnOk"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/txtNotes"
android:layout_toRightOf="@id/btnReset"
android:layout_alignParentRight="true"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:text="Add Timing To List"
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</RelativeLayout>
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strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Timer</string>
<string name="dlg_edit_timing_title">Edit A Timing</string>
<string name="add_scroll_down_for_more">< Scroll down for more options! ></string>
<string name="add_scroll_down_to_add">< Scroll down to save this timing! ></string>
<string name="start_timing">Start Timing
</string>
<string name="stop_timing">Pause Timing
</string>
<string name="resume_timing">Resume Timing
</string>
</resources>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="bug.android.scrollview"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MyTestApp"
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>
<uses-sdk android:minSdkVersion="5" />
</manifest>
UPDATE 1: Adding if( btnStartStopResume.isInTouchMode() )
Toast.makeText(this, "TOUCH MODE", 2000);
elseToast.makeText(this, "NOT touch mode", 2000);
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UPDATE 2:
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