Android Intent

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

<intent-filter>
    <action android:name="com.example.bingghost.TEST" />

    <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

Intent intent = new Intent("com.example.bingghost.TEST");
startActivity(intent);

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

;

Intent intent = getIntent();

String data = intent.getStringExtra("extra_data");

1.无参数Activity跳转
Intent it = new Intent(Activity.Main.this, Activityclass);
startActivity(it);

2.向下一个Activity传递数据（使用Bundle和Intent.putExtras）
Intent it = new Intent(Activity.Main.this, Activityclass);
Bundle bundle = new Bundle();
bundle.putString("name", "This is from MainActivity!");
it.putExtras(bundle);     // it.putExtra("test","shuju");
startActivity(it);        // startActivityForResult(it,REQUEST_CODE);

3.对于数据的获取可以采用:
Bundle bundle=getIntent().getExtras();
String name=bundle.getString("name");

4.向上一个Activity返回结果（使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动的Activity）
Intent intent = getIntent();
Bundle bundle2 = new Bundle();
bundleputString("name", "This is from ShowMsg!");
intent.putExtras(bundle2);
setResult(RESULT_OK, intent);

5.回调上一个Activity的结果处理函数（onActivityResult）
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub
  super.onActivityResult(requestCode, resultCode, data); 
  if (requestCode==REQUEST_CODE){
    if(resultCode==RESULT_CANCELED)
      setTitle("cancle");
  else if (resultCode==RESULT_OK) {
    String temp=null;
    Bundle bundle=data.getExtras();
    if(bundle!=null) temp=bundle.getString("name");
       setTitle(temp);
    }
  }
}



下面是转载来的其他的一些Intent用法实例（转自javaeye）
○显示网页
Uri uri = Uri.parse("http://google.com");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);

○显示地图
Uri uri = Uri.parse("geo:3899533,-7036476");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);

○路径规划
Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);

○打电话
//叫出拨号程序
Uri uri = Uri.parse("tel:0800000123");
Intent it = new Intent(Intent.ACTION_DIAL, uri);
startActivity(it);

//直接打电话出去
Uri uri = Uri.parse("tel:0800000123");
Intent it = new Intent(Intent.ACTION_CALL, uri);
startActivity(it);


○传送SMS/MMS
//调用短信程序
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.putExtra("sms_body", "The SMS text");
it.setType("vnd.android-dir/mms-sms");
startActivity(it);

//传送消息
Uri uri = Uri.parse("smsto://0800000123");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
it.putExtra("sms_body", "The SMS text");
startActivity(it);

//传送 MMS
Uri uri = Uri.parse("content://media/external/images/media/23");
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra("sms_body", "some text");
it.putExtra(Intent.EXTRA_STREAM, uri);
it.setType("image/png");
startActivity(it);

○传送 Email
Uri uri = Uri.parse("mailto:xxx@abc.com");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(it);
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");
it.putExtra(Intent.EXTRA_TEXT, "The email body text");
it.setType("text/plain");
startActivity(Intent.createChooser(it, "Choose Email Client"));
Intent it=new Intent(Intent.ACTION_SEND);
String[] tos={"me@abc.com"};
String[] ccs={"you@abc.com"};
it.putExtra(Intent.EXTRA_EMAIL, tos);
it.putExtra(Intent.EXTRA_CC, ccs);
it.putExtra(Intent.EXTRA_TEXT, "The email body text");
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
it.setType("message/rfc822");
startActivity(Intent.createChooser(it, "Choose Email Client"));

//传送附件
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");
sendIntent.setType("audio/mp3");
startActivity(Intent.createChooser(it, "Choose Email Client"));

○播放多媒体
Uri uri = Uri.parse("file:///sdcard/song.mp3");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.setType("audio/mp3");
startActivity(it);
Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);

○Market 相关
//寻找某个应用
Uri uri = Uri.parse("market://search?q=pname:pkg_name");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
//where pkg_name is the full package path for an application
//显示某个应用的相关信息
Uri uri = Uri.parse("market://details?id=app_id");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
//where app_id is the application ID, find the ID
//by clicking on your application on Market home
//page, and notice the ID from the address bar

○Uninstall 应用程序
Uri uri = Uri.fromParts("package", strPackageName, null);
Intent it = new Intent(Intent.ACTION_DELETE, uri);
startActivity(it);