在屏幕中显示复选框

迷南。 2022-09-24 04:20 223阅读 0赞

<?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"
        >
        
    <CheckBox android:id="@+id/plain_cb"
         android:text="AA"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
    />
     
    <CheckBox android:id="@+id/serif_cb"
         android:text="BB"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:typeface="serif"
    />
     
    <CheckBox android:id="@+id/bold_cb"
         android:text="CC"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textStyle="bold"
    />
     
    <CheckBox android:id ="@+id/italic_cb"
         android:text="DD"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textStyle="italic"
    />
    
    
    	<Button android:id="@+id/get_view_button" 
    	    android:layout_width="wrap_content"
    		android:layout_height="wrap_content" 
    		android:text="获取复选框的值" />
        
    </LinearLayout>

</pre><pre name="code" class="java">package m.usewidget;
    
    import m.usewidget.R;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.EditText;
    import android.widget.TextView;
    
    public class CheckBoxActivity extends Activity {
    	CheckBox plain_cb;
    	CheckBox serif_cb;
    	CheckBox italic_cb;
    	CheckBox bold_cb;
    
    	/** Called when the activity is first created. */
    	@Override
    	public void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setTitle("CheckBoxActivity");
    		setContentView(R.layout.check_box);
    		find_and_modify_text_view();
    	}
    
    	private void find_and_modify_text_view() {
    		plain_cb = (CheckBox) findViewById(R.id.plain_cb);
    		serif_cb = (CheckBox) findViewById(R.id.serif_cb);
    		italic_cb = (CheckBox) findViewById(R.id.italic_cb);
    		bold_cb = (CheckBox) findViewById(R.id.bold_cb);
    		Button get_view_button = (Button) findViewById(R.id.get_view_button);
    		get_view_button.setOnClickListener(get_view_button_listener);
    	}
    
    	private Button.OnClickListener get_view_button_listener = new Button.OnClickListener() {
    		public void onClick(View v) {
    			String r = "";
    			if (plain_cb.isChecked()) {
    				r = r + "," + plain_cb.getText();
    			}
    			if (serif_cb.isChecked()) {
    				r = r + "," + serif_cb.getText();
    			}
    			if (italic_cb.isChecked()) {
    				r = r + "," + italic_cb.getText();
    			}
    			if (bold_cb.isChecked()) {
    				r = r + "," + bold_cb.getText();
    			}
    			setTitle("Checked: " + r);
    		}
    	};
    }