package com.example.usingintent;

import android.R.integer;

import android.app.Activity;

import android.app.LauncherActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Toast;

public class MainActivity extends Activity {

    int request_Code = 1;

    protected void onCreate(Bundle savedInstanceState){

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

    public void onClick(View v){

        Intent intent = new Intent(MainActivity.this,SecondActivity.class);

        startActivity(intent);

    }

    public void onClick2(View v){

        Intent intent = new Intent(MainActivity.this,SecondActivity.class);

        startActivityForResult(intent, request_Code);

    }

    public void onClick3(View v){

        Intent intent = new Intent("com.example.usingintent.SecondActivity");

        intent.putExtra("str1", "This is string 1");

        intent.putExtra("age1", 24);

        Bundle bundle = new Bundle();

        bundle.putString("str2", "This is string 2");

        bundle.putInt("age2", 48);

        intent.putExtras(bundle);

        startActivityForResult(intent, request_Code);

    }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        // TODO Auto-generated method stub

        if(requestCode == request_Code){

            if(resultCode==RESULT_OK){

                Toast.makeText(this, data.getData().toString(),    Toast.LENGTH_SHORT).show();

            }else if(resultCode == 24){

                Toast.makeText(this, Integer.toString(data.getIntExtra("age3", 1)), Toast.LENGTH_SHORT).show();

                Toast.makeText(this, data.getData().toString(), Toast.LENGTH_SHORT).show();

            }

        }

    }

}

package com.example.usingintent;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class SecondActivity extends Activity {

    protected void onCreate(Bundle savedInstanceState){

        super.onCreate(savedInstanceState);

        setContentView(R.layout.second);

        //获取传递过来的数据

        Toast.makeText(this, getIntent().getStringExtra("str1"), Toast.LENGTH_SHORT).show();

        Toast.makeText(this, Integer.toString(getIntent().getIntExtra("age1",0)), Toast.LENGTH_SHORT).show();

        Bundle bundle = getIntent().getExtras();

        Toast.makeText(this, bundle.getString("str2"), Toast.LENGTH_SHORT).show();

        Toast.makeText(this, Integer.toString(bundle.getInt("age2")), Toast.LENGTH_SHORT).show();

    }

    public void onClick(View v) {

        Intent data = new Intent();

        EditText editText = (EditText)findViewById(R.id.txt_username);

        data.setData(Uri.parse(editText.getText().toString()));

        setResult(RESULT_OK, data);

        //destroy current activity

        finish();

    }

    public void onClick2(View v) {

        Intent intent = new Intent();

        //返回数据

        intent.putExtra("age3", 45);

        intent.setData(Uri.parse("something pass back to main activity"));

        setResult(24, intent);

        //destroy current activity

        finish();

    }

}