Activity 间 bundle 传递参数

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activity_main.xml

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

</TableRow>
    <TableRow >
       <TextView />

    </TableRow>

</TableRow>

    <TableRow >

               <TextView />
    </TableRow>

    <TableRow >
        <TextView />

        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="startActivity" />

</TableLayout>

activity_second.xml

</RelativeLayout>

MainActivity.java

package com.example.login;

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

public class MainActivity extends Activity {

Button btn,btn2;

EditText edtName,edtPass;

@Override
   protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.activity_main);

       setTitle("登录");



       btn=(Button)findViewById(R.id.button1);

       btn.setOnClickListener( new View.OnClickListener() {

           @Override
           public void onClick(View v) {
               // TODO Auto-generated method stub

               edtName=(EditText)MainActivity.this.findViewById(R.id.editText1);

               edtPass=(EditText)MainActivity.this.findViewById(R.id.editText2);

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

               Bundle bundle = new Bundle();

               bundle.putString("action", "1");

               bundle.putString("name", edtName.getText().toString());

               bundle.putString("pass", edtPass.getText().toString());

               intent.putExtras(bundle);

               startActivity(intent);



           }
       });


       btn2=(Button)MainActivity.this.findViewById(R.id.button2);

       btn2.setOnClickListener(new View.OnClickListener() {

           @Override
           public void onClick(View v) {
               // TODO Auto-generated method stub
   edtName=(EditText)MainActivity.this.findViewById(R.id.editText1);

               edtPass=(EditText)MainActivity.this.findViewById(R.id.editText2);

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

               Bundle bundle = new Bundle();

               bundle.putString("action", "2");

               bundle.putString("name", edtName.getText().toString());

               bundle.putString("pass", edtPass.getText().toString());

               intent.putExtras(bundle);

               startActivityForResult(intent,0);
           }
       });

}

@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;
   }

/* (non-Javadoc)
   * @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
   */
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       // TODO Auto-generated method stub
       super.onActivityResult(requestCode, resultCode, data);
       TextView tv=(TextView)this.findViewById(R.id.textView3);
       if(requestCode==0)
           if(resultCode==RESULT_OK)
           {
               tv.setText(data.getExtras().getString("ret"));
           }
   }

}

SecondActivity.java

package com.example.login;

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

public class SecondActivity extends Activity {

Button btn, btn2;

TextView tv1, tv2, tv5;

@Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_second);

setTitle("主界面");

Bundle bundle = getIntent().getExtras();

String act = bundle.getString("action");

String name = bundle.getString("name");

String pass = bundle.getString("pass");

tv1 = (TextView) findViewById(R.id.textView2);

tv2 = (TextView) findViewById(R.id.textView4);

tv5 = (TextView) findViewById(R.id.textView5);

tv1.setText(name);

tv2.setText(pass);

tv5.setText(act);

btn = (Button) findViewById(R.id.button1);

btn.setOnClickListener(new View.OnClickListener() {

@Override
           public void onClick(View v) {
               // TODO Auto-generated method stub
               Intent intent = new Intent(SecondActivity.this,
                       MainActivity.class);

startActivity(intent);
}
});

btn2 = (Button) findViewById(R.id.button2);

btn2.setOnClickListener(new View.OnClickListener() {

@Override
           public void onClick(View v) {
               // TODO Auto-generated method stub

               Intent intent=getIntent();

               Bundle bundle = new Bundle();

               bundle.putString("ret", "from setresult");

               intent.putExtras(bundle);

               setResult(RESULT_OK, intent);

               finish();
           }
       });
   }

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

}