Android2 Activity跳转

最基本的java文件格式：

package com.example.activity;
import android.os.Bundle;
import android.app.Activity;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}

 

activity跳转：intent方法。

 

package com.example.act;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.Activity;
import android.content.Intent;

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
System.out.println("onCreate");
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener(){
public void onClick(View V){
Intent intent=new Intent();
intent.setClass(MainActivity.this, Two.class);
startActivity(intent);
}

});

}

@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
System.out.println("onStart");
}

@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
System.out.println("onResume");
}

@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
System.out.println("onPause");
}

@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
System.out.println("onStop");
Boolean vBoolean = isFinishing();
System.out.println(vBoolean);
}

@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
System.out.println("onRestart");
}

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Boolean vBoolean = isFinishing();
System.out.println(vBoolean);
System.out.println("onDestory");
}
}

 

package com.example.act;

import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Two extends ActionBarActivity {

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.two);
System.out.println("2onCreate");
Button button2 = (Button)findViewById(R.id.button2);
button2.setOnClickListener(new OnClickListener(){
public void onClick(View V){
Intent intent=new Intent();
intent.setClass(Two.this, MainActivity.class);
startActivity(intent);
}

});
}

@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
System.out.println("2onStart");
}

@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
System.out.println("2onResume");
}

@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
System.out.println("2onPause");
}

@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
System.out.println("2onStop");
Boolean vBoolean = isFinishing();
System.out.println(vBoolean);
}

@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
System.out.println("2onRestart");
}

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Boolean vBoolean = isFinishing();
System.out.println(vBoolean);
System.out.println("2onDestory");
}

}

 

 还要在AndroidManifest.xml中添加

<activity
android:name=".Two"
android:label="@string/title_activity_two" >
</activity>

 

 

 

在位置：

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Two"
android:label="@string/title_activity_two" >
</activity>
</application>

 

 

 

两个activity直接传递消息：

intent来执行

核心代码：1

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_extra);
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent=new Intent();
intent.setClass(ExtraActivity.this, ResultActivity.class);//当前act和即将启动的act
Bundle bundle = new Bundle();
bundle.putString("data", "1"); //见和值
intent.putExtras(bundle);//传递数据
startActivityForResult(intent,0);
}
});
}

2

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_result);
final Intent intent = getIntent();
String result = intent.getStringExtra("data");//获取键为data的字典所传递的字符串型数据
Toast.makeText(ResultActivity.this, result, Toast.LENGTH_SHORT).show();//显示出来

Button button2 = (Button)findViewById(R.id.button2);
button2.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
setResult(RESULT_OK, intent);
finish();
}
});
}