学步园

Intent intent = new Intent();

intent.setAction(Intent.ACTION_CALL);//设置拨号动作

intent.setData(Uri.parse("tel:110"));//设置号码

startActivity(intent);//开始拨号

<manifest xmlns:android=”http://schemas.android.com/apk/res/android”

Package=”com.example.edittext”

Android:versionCode=”1”

Android:versionName=”1.0”>

  <uses-permission android:name="android.permission.CALL_PHONE"/>

</manifest>

Intent intent = new Intent();

intent.setAction(Intent.ACTION_CALL);//设置发短信动作

intent.setData(Uri.parse("tel:110"));//设置号码

intent.putExtra("sms_body", "Welcome to China!");//设置短信内容

startActivity(intent);//开始进入发短信界面

<uses-permission android:name="android.permission.SEND_SMS"/>

  <uses-permission android:name="android.permission.CALL_PHONE"/>

</manifest>

1、在主activity中设置下一个activity

  Intent intent = new Intent();

  // SecondActivity.class是启动的另一个activity

  intent.setClass(MainActivity.this, SecondActivity.class);

  intent.putExtra("str", "this isintent...");//activity之间传参

  startActivity(intent);//启动另一个Activity

2、注册Activity，每个Activity必须要在androidManifest.xml文件中注册

  <activity

            android:name="com.example.edittext.SecondActivity"

            android:label="SecondActivity“/>

3、被启动的activity

  public class SecondActivity extends Activity {

  protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.second);

  Intent intent = this.getIntent();//getIntent方法可以得到传递过来的Intent

  Bundle bun = intent.getExtras();//getExtras方法可以获得intent中的键值对

  String str = (String)bun.getString("str");//接收到的参数

  }

  }

4、finish()：结束当前activity，返回到调用它的activity中。

private final static int REQUEST_CODE=1;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Intentintent = new Intent();

intent.setClass(MainActivity.this, SecondActivity.class);

intent.putExtra("str","this is intent...");

startActivityForResult(intent,REQUEST_CODE);//启动另一个activity

}

//重写onActivityResult方法接收上面启动的那个activity的返回值

protected void onActivityResult(int requestCode, int resultCode,Intent data) {

super.onActivityResult(requestCode, resultCode,data);

if(requestCode ==REQUEST_CODE){

if(resultCode == SecondActivity.RESULT_CODE){

Bundlebundle = data.getExtras();

Stringstr = bundle.getString("secdata");

Toast.makeText(MainActivity.this, str, Toast.LENGTH_LONG).show();

}

}

}