Android UI control series: TextView (text box)

TextView is relatively simple and cannot be used for editing. It can only be used to display information.

Some commonly used XML attributes in layout files

android:gravity—used to set the content of the control. Alignment of text

android:layout_gravity—used to set the alignment of the control relative to the parent control

android:text—used to set the text information of the control

android:layout_width—used to set the width of the control

android:layout_height—used to set the height of the control

android:background—used to set the background color of the control

android :textColor—used to set the color of the text in the control

android:textSize—used to set the text font size of the control

android:width and android:height—functions similar to android:layout_width

Difference:

android:layout_width can only set fill_parent (fill the entire screen horizontally) or
wrap_content (fill the size of the control itself horizontally)

android:width sets specific controls The horizontal size unit is pixels
For example: TextView display

main.xml layout file

<?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:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="@string/hello"  
    />  
</LinearLayout>

string.xml file

<?xml version="1.0" encoding="utf-8"?>  
<resources>  
    <string name="hello">Hello World, MyTestView!</string>  
    <string name="app_name">MyTestView</string>  
</resources>

MyTextView.java file

package org.loulijun.MyTestView;  
  
import android.app.Activity;  
import android.os.Bundle;  
  
public class MyTestView extends Activity {  
    /** Called when the activity is first created. */  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
    }  
}

Running results:

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