MainActivity.java
package com.example.basic_intent;
//使用 Intent 跳到其他的Activity
//並使用 startActivityForResult() 來傳送 requestCode
//並設定 onActivityResult() 來接收過濾 requestCode / resultCode
//並在 MainTwo.java 中設定要丟回來的資料到 Intent 中
//最後 MainActivity.java onActivityResult() 接收資料
//要修改 AndroidManifest.xml
//將 Activity 加到啟動程序中
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
final static int KEY_CHAIN = 333;
final static int KEY_HOLE = 333;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i("生命週期", "1_onCreate");
Button go2 = (Button) this.findViewById(R.id.button1);
go2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getBaseContext(), MainTwo.class);
//startActivity(intent);
startActivityForResult(intent, KEY_CHAIN);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.i("返回訊息", "回到onActivityResult");
if(requestCode == KEY_CHAIN){
//if(resultCode == RESULT_OK){
if(resultCode == KEY_HOLE){
Log.i("返回訊息", "正常收到KEY_HOLE的資料");
//取回MainTwo 送回來的資料
Log.i("返回訊息", data.getExtras().getString("result"));
}
}
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
//finish();
Log.i("生命週期", "1_onStop");
//Toast.makeText(getBaseContext(), "go2 結束了", Toast.LENGTH_LONG).show();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
Log.i("生命週期", "1_onPause");
}
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
Log.i("生命週期", "1_onRestart");
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
Log.i("生命週期", "1_onResume");
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
Log.i("生命週期", "1_onStart");
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Log.i("生命週期", "1_onDestroy");
}
}
MainTwo.java
package com.example.basic_intent;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
//import android.widget.Toast;
public class MainTwo extends Activity {
final static int KEY_CHAIN = 333;
final static int KEY_HOLE = 333;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_two);
Log.i("生命週期", "2_onCreate");
Button go1 = (Button) this.findViewById(R.id.button1);
go1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//也可以只送 resultCode,不送任何資料
//setResult(KEY_HOLE);
Intent intent = new Intent();
//intent.setClass(getBaseContext(), MainActivity.class);
intent.putExtra("result", "我在測試送回去的結果");
//setResult(RESULT_OK,intent);
setResult(KEY_HOLE,intent);
//startActivity(intent);
MainTwo.this.finish();
}
});
}
@Override
protected void onStop() {
super.onStop();
//finish();
Log.i("生命週期", "2_onStop");
//Toast.makeText(getBaseContext(), "go2 結束了", Toast.LENGTH_LONG).show();
}
@Override
protected void onPause() {
super.onPause();
Log.i("生命週期", "2_onPause");
}
@Override
protected void onRestart() {
super.onRestart();
Log.i("生命週期", "2_onRestart");
}
@Override
protected void onResume() {
super.onResume();
Log.i("生命週期", "2_onResume");
}
@Override
protected void onStart() {
super.onStart();
Log.i("生命週期", "2_onStart");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("生命週期", "2_onDestroy");
}
}
