Intent之使用Extra属性在组件之间传递数据

第一步:

在MainActivity中应用Intent封装数据并传到第二个Activity

package com.example.intent;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
	private EditText m_Id_et,m_Name_et,m_Salary_et;
	private Button m_btn_ok;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		m_Id_et = (EditText) findViewById(R.id.et_id);
		m_Name_et = (EditText) findViewById(R.id.et_name);
		m_Salary_et = (EditText) findViewById(R.id.et_salary);
		m_btn_ok = (Button) findViewById(R.id.btn_ok);

		m_btn_ok.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				int id;String name;float salary;
				id = Integer.valueOf(m_Id_et.getText().toString());
				name = m_Name_et.getText().toString();
				salary = Float.valueOf(m_Salary_et.getText().toString());

				Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
				/*
				 * 第二种方法应用Bundle封装数据
				 */
				Bundle bundle = new Bundle();
				bundle.putInt("id", id);
				bundle.putString("name", name);
				bundle.putFloat("salary",salary);
				intent.putExtras(bundle);

				//第一种方法直接应用intent.putExtra封装,这类方法实质也是操作Bundle)

				//				intent.putExtra("id", id);
				//				intent.putExtra("name", name);
				//				intent.putExtra("salary", salary);
				startActivity(intent);

			}
		});

	}
}
pack