安卓第八次作业

package cn.itcast.checkbox;

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;
import android.widget.TextView;

public class MainActivity extends Activity {
    EditText et1,et2;
    Button btn1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et1=(EditText) findViewById(R.id.et2);
        et2=(EditText) findViewById(R.id.et1);
        btn1=(Button) findViewById(R.id.btn3);
        btn1.setOnClickListener(new OnClickListener() {
            
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setClass(MainActivity.this, MainActivity2.class);
                //intent.putExtra("zhanghao", et1.getText().toString());
                intent.putExtra("zhanghao", et1.getText().toString());
                startActivity(intent);
            }
        });
    }


   
    
}


package cn.itcast.checkbox;

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;
import android.widget.TextView;

public class MainActivity2 extends Activity {

    TextView tv1,tv2;
    Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity2);
        tv1=(TextView) findViewById(R.id.tv1);
        tv2=(TextView) findViewById(R.id.tv3);
        btn=(Button) findViewById(R.id.btn4);
        Intent intent =getIntent();
        tv1.setText("用户名"+intent.getStringExtra("zhanghao"));
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Intent intent =new Intent(MainActivity2.this,MainActivity3.class);
                startActivityForResult(intent, 1);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==1&&resultCode==2){
            tv2.setText("充值金额"+data.getStringExtra("jine"));
        }
    }

}



package cn.itcast.checkbox;

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.EdgeEffect;
import android.widget.EditText;

public class MainActivity3 extends Activity {

    EditText et;
    Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity3);
        et=(EditText) findViewById(R.id.et6);
        btn=(Button) findViewById(R.id.btn5);
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent intent = new Intent();
                intent.putExtra("jine", et.getText().toString());
                setResult(2,intent);
                finish();
            }
        });
    }

    
}

<RelativeLayout 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" >

    <Button
        android:id="@+id/btn3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="注册" />

    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/et1"
        android:layout_toLeftOf="@+id/btn3"
        android:text="用户名" />

    <EditText
        android:id="@+id/et2"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/btn3"
        android:layout_alignTop="@+id/btn2"
        android:ems="10"
        android:hint="请输入用户名" />

    <EditText
        android:id="@+id/et1"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/et2"
        android:layout_alignTop="@+id/btn1"
        android:ems="10"
        android:hint="请输入密码" >

        
    </EditText>

    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/btn2"
        android:layout_alignParentTop="true"
        android:layout_marginTop="16dp"
        android:gravity="center"
        android:text="密码" />

</RelativeLayout>
<LinearLayout 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=".MainActivity2"
    android:orientation="vertical" >

    <TextView
         android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_gravity="center_horizontal"
        />
    <TextView
        android:id="@+id/tv2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_gravity="center_horizontal"
        />

    <Button
        android:id="@+id/btn4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="我要充值" />

    <TextView
        android:id="@+id/tv3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="充值金额为0元"/>
</LinearLayout>
<LinearLayout 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=".MainActivity3"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/et6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="充值金额为" />
    <Button
        android:id="@+id/btn5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="充值" />

</LinearLayout>