Eclipse 开发 Android, Hello FormStuff（学习9）
16lz
2021-01-23
HelloFormStuff .java 代码如下
package com.example.test;import android.app.Activity;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.widget.CheckBox;import android.widget.EditText;import android.widget.ImageButton;import android.widget.RadioButton;import android.widget.Toast;import android.widget.ToggleButton;public class HelloFormStuff extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final ImageButton button = (ImageButton) findViewById(R.id.android_button); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Perform action on clicks Toast.makeText(HelloFormStuff.this, "Beep Bop", Toast.LENGTH_SHORT).show(); } }); final EditText edittext = (EditText) findViewById(R.id.edittext); edittext.setOnKeyListener(new View.OnKeyListener() { public boolean onKey(View v, int keyCode, KeyEvent event) { if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) { // Perform action on key press Toast.makeText(HelloFormStuff.this, edittext.getText(), Toast.LENGTH_SHORT).show(); return true; } return false; } }); final CheckBox checkbox = (CheckBox) findViewById(R.id.checkbox); checkbox.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Perform action on clicks if (checkbox.isChecked()) { Toast.makeText(HelloFormStuff.this, "Selected", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(HelloFormStuff.this, "Not selected", Toast.LENGTH_SHORT).show(); } } }); View.OnClickListener radio_listener = new View.OnClickListener() { public void onClick(View v) { // Perform action on clicks RadioButton rb = (RadioButton) v; Toast.makeText(HelloFormStuff.this, rb.getText(), Toast.LENGTH_SHORT).show(); } }; final RadioButton radio_red = (RadioButton) findViewById(R.id.radio_red); final RadioButton radio_blue = (RadioButton) findViewById(R.id.radio_blue); radio_red.setOnClickListener(radio_listener); radio_blue.setOnClickListener(radio_listener); final ToggleButton togglebutton = (ToggleButton) findViewById(R.id.togglebutton); togglebutton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Perform action on clicks if (togglebutton.isChecked()) { Toast.makeText(HelloFormStuff.this, "ON", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(HelloFormStuff.this, "OFF", Toast.LENGTH_SHORT).show(); } } }); } } layout->main.xml
<?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" ><ImageButton android:id="@+id/android_button" android:layout_width="100dip" android:layout_height="wrap_content" android:src="@drawable/android" /><EditText android:id="@+id/edittext" android:layout_width="fill_parent" android:layout_height="wrap_content"/><CheckBox android:id="@+id/checkbox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="check it out" /><RadioGroup android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical"> <RadioButton android:id="@+id/radio_red" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Red" /> <RadioButton android:id="@+id/radio_blue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Blue" /> </RadioGroup><ToggleButton android:id="@+id/togglebutton" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
run it 结果如下：
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