android自定義LinearLayout和View

自定義線性布局經常用到：

第一種是在擴展的LinearLayout構造函數中使用Inflater加載一個布局，並從中提取出相關的UI組件進行封裝，形成一個獨立的控件。在使用該控件時，由於它所有的子元素都是在運行時通過代碼動態創建的，所以該控件只能以一個獨立控件的形式在Layout文件中聲明，例如：

 

public class CustomLayout extends LinearLayout{

       public  CustomLayout(Context context){
                 LayoutInflater mInflater = LayoutInflater.from(context);
                View myView = mInflater.inflate(R.layout.receive, null);
                addView(myView);

       }
}

< LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  androidundefinedrientation="vertical" >
  
          
  
  
                   
                   
< /LinearLayout>

實例：

 

imagebtn.xml

 

MyLinearLayout1.java

 

 

package com.hust.customlinearlayout;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MyLinearLayout1 extends LinearLayout {
	private ImageView imageView;
	private TextView  textView;
	public MyLinearLayout1(Context context){
		super(context);
	}
	public MyLinearLayout1(Context context, AttributeSet attrs) {
		super(context, attrs);	
		LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		inflater.inflate(R.layout.imagebtn, this);
		imageView=(ImageView) findViewById(R.id.imageView1);
		textView=(TextView)findViewById(R.id.textView1);	
		
		
	}
  
	public void setImageResource(int resId){
		imageView.setImageResource(resId);
	}
	public void setTextViewText(String text){
		textView.setText(text);
	}
}

activity_main.xml

 

 

package com.hust.customlinearlayout;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
    private MyLinearLayout1 myLinearLayout1;
    private MyLinearLayout1 myLinearLayout2;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		myLinearLayout1=(MyLinearLayout1) findViewById(R.id.btn_right);
		myLinearLayout2=(MyLinearLayout1) findViewById(R.id.btn_error);
		
		myLinearLayout1.setTextViewText("確定");
		myLinearLayout2.setTextViewText("取消");
		myLinearLayout1.setImageResource(R.drawable.confirm);
		myLinearLayout2.setImageResource(R.drawable.cancle);
		myLinearLayout1.setOnClickListener(new View.OnClickListener() {
			
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Toast.makeText(getApplicationContext(), "點擊的正確按鈕", 1).show();
			}
		});
		
		myLinearLayout2.setOnClickListener(new View.OnClickListener() {
			
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Toast.makeText(getApplicationContext(), "點擊的錯誤按鈕", 1).show();
			}
		});
		
	}

	
}

 

第二種方式是：這個自定義VIEW中的任何控件都不是通過XML文件來定義的，而是在JAVA代碼中通過動態生成的，然後再addView()加入到你自定義的View中，

 

private class SpeechView extends LinearLayout {  

        private TextView mTitle;  
        private TextView mDialogue;  

        public SpeechView(Context context, String title, String words) {  
            super(context);  
            this.setOrientation(VERTICAL);  
             // Here we build the child views in code. They could also have  

            // been specified in an XML file.
            mTitle = new TextView(context);
            mTitle.setText(title);  
            addView(mTitle, new LinearLayout.LayoutParams(  

                   LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

             mDialogue = new TextView(context);  
            mDialogue.setText(words); 
            addView(mDialogue, new LinearLayout.LayoutParams(
                    LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

        } 

       /** 
        * Convenience method to set the title of a SpeechView
         */         

       public void setTitle(String title) {  
                      mTitle.setText(title);  

       }       

         /**
         * Convenience method to set the dialogue of a SpeechView 

        */  

       public void setDialogue(String words) {
                mDialogue.setText(words); 
        }  

      }