Android開發之通過接口回調機制加載數據（源代碼分享）

Android開發之通過接口回調機制加載數據的簡單實現，在實際開發中通過callback方法得到網絡加載的數據的使用頻率遠比通過直接開啟線程或異步任務加載數據的頻率高的多，這篇文章的代碼將簡單實現該機智的調用，體會下callback的精髓。

MainActivity的代碼

package com.example.f07_callback01;

import com.example.f07_callback01.A.Callback;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
   private Button button;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button=(Button)this.findViewById(R.id.button1);
		button.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				A getString=new A();
				//通過調用接口得到數據
				getString.loadString("", new Callback() {
					
					@Override
					public void get(String result) {
						// TODO Auto-generated method stub
						Log.i("TAG", "-------->"+result);
					}
				});
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

package com.example.f07_callback01;

public class A {
	//模擬從服務器端得到字符串
	public void loadString(String path,final Callback callback){
		new Thread(new Runnable() {
			
			@Override
			public void run() {
				// TODO Auto-generated method stub
				String msg="通過接口調用數據";
				
				callback.get(msg);
			}
		}).start();
	}
	
	public interface Callback{
		public void get(String result);
	}

}