Krish Krish - 6 months ago 42
Android Question

Textview Gravity not working properly in android

What's wrong with my code, I'm trying to display my textview named "invalid",in different location(left,right,center),but the gravity(left,right,center) won't work,enter image description here

My text.xml is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="20dp" >

<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/etext"
android:hint="@string/comment"
android:inputType="textPassword"
/>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="100"
>
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/button"
android:layout_weight="25"/>

<ToggleButton
android:id="@+id/toggleButton1"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:text="ToggleButton"
android:layout_weight="75"
android:checked="true"
android:paddingLeft="15dp"/>
</LinearLayout>

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/invalid"
android:layout_gravity="center"
android:gravity="center" />
</LinearLayout>


My TextPlay.java is

package com.example.thenewboston;
import android.app.Activity;
import android.os.Bundle;
import android.text.InputType;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.ToggleButton;
public class TextPlay extends Activity {
Button button;
ToggleButton tbutton;
TextView tview;
EditText et;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.text);
button = (Button) findViewById(R.id.button1);
tbutton = (ToggleButton) findViewById(R.id.toggleButton1);
tview = (TextView) findViewById(R.id.textView1);
et = (EditText) findViewById(R.id.etext);
tbutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (tbutton.isChecked()) {
et.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
} else {
et.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
}
}
});
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String input = et.getText().toString();
System.out.println(input);
if (input.contentEquals("left")) {
tview.setGravity(Gravity.LEFT);
} else if (input.contentEquals("right")) {
System.out.println("inside right");
tview.setGravity(Gravity.RIGHT);
} else if (input.contentEquals("right")) {
tview.setGravity(Gravity.CENTER);
}
}
});
}
}

Answer

You set this text view a width of "wrap_content" it means, what ever the text is, the view take the size of the text.

and in the LinearLayout , the default gravity (used here) is 'center'

you should try this :

<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"   <= change this
android:layout_height="wrap_content"
android:text="@string/invalid"
android:gravity="center"   <= then this gravity will be taken into account
/>