Activity 间 bundle 传递参数
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
android:id="@+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dp"
android:text="用户名:" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dp"
android:ems="10" >
<requestFocus />
</EditText>
</TableRow>
<TableRow >
<TextView />
</TableRow>
<TableRow
android:id="@+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dp"
android:text="密 码:" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:padding="3dp"
android:inputType="textPassword" />
</TableRow>
<TableRow >
<TextView />
</TableRow>
<TableRow >
<TextView />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="startActivity" />
<TextView />
</TableRow>
<TableRow >
<TextView />
</TableRow>
<TableRow >
<TextView />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="startActivityForResult" />
<TextView />
</TableRow>
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" />
</TableLayout>
activity_second.xml
<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=".SecondActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="31dp"
android:layout_marginTop="42dp"
android:text="用户名:" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView1"
android:layout_alignBottom="@+id/textView1"
android:layout_marginLeft="24dp"
android:layout_toRightOf="@+id/textView1"
android:text="" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginTop="30dp"
android:text="密 码:" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView3"
android:layout_alignBottom="@+id/textView3"
android:layout_alignLeft="@+id/textView2"
android:text="" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView4"
android:layout_marginTop="29dp"
android:layout_toRightOf="@+id/textView3"
android:text="返回" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:layout_marginTop="70dp"
android:layout_toLeftOf="@+id/button1"
android:text="" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:layout_marginTop="20dp"
android:layout_toRightOf="@+id/textView1"
android:text="Button" />
</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;
}
}
