[Android] android Program Interface Programming and View Components

import android.widget.EditText;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.PopupWindow;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RelativeLayout;import android.widget.SeekBar;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.TextView;import android.widget.Toast;import android.widget.ViewSwitcher;

	Related Methods	Description
	SetVilibility (int)	Set whether the component is visible

Android: layout_height	Height of the Child widget Layout
Android: layout_width	Specify the layout width of the Child widget.

android:layout_width="fill_parent"android:layout_height="wrap_content"

XML attributesRelated MethodsDescriptionAndroid: layout_marginBottomSetMargins (int, int)The margin of the Child widget.Android: layout_marginLeftSetMargins (int, int)The margin on the left of the Child widget.Android: layout_marginRightSetMargins (int, int)The margin on the Right of the Child widget.Android: layout_marginTopSetMargins (int, int)The margin above the child widget.

android:layout_marginTop="10dp" android:layout_marginLeft="10dp"android:layout_marginRight="10dp"android:layout_marginBottom="10dp"

<TextView android: id = "@ + id/show_helloworld" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "I implemented the XML layout file" android: textColor = "@ color/LightOrange"/>

setContentView(R.layout.main);

private Text showText;

showText = (Text) findViewById(R.id.show_helloworld);

// Create a linear layout manager LinearLayout layout = new LinearLayout (this); // set anctilayout to display layoutsuper. setContentView (layout); layout. setOrientation (LinearLayout. VERTICAL); // create a TextViewfinal TextView textView = new TextView (this); textView. setText ("I implemented it through java code ...... "); Layout. addView (textView );

In the MainActivity class, call:

showText = (Button) findViewById(R.id.show_helloworld);showText.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent intent = new Intent(MainActivity.this,JavaActivity.class);startActivity(intent);}});