intent和手势探测

一、三种启动方法

setComponent

ComponentName comp = new ComponentName(

    this, SecondActivity.class);

Intent intent = new Intent();

intent.setComponent(comp);

startActivity(intent);

setClass

public Intent setClass(

    Context packageContext, Class<?> cls)

Intent intent = new Intent();

intent.setClass(this, SecondActivity.class);

startActivity(intent);

intent构造方法

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

二、数据传递

public Intent putExtras(Bundle extras)

public Bundle getExtras()

数据返回

public void startActivityForResult(

        Intent intent, int requestCode)；

public final void setResult(

        int resultCode, Intent data);

protected void onActivityResult(

    int requestCode, int resultCode, Intent data)

三、手势探测

public GestureDetector(Context context,     GestureDetector.OnGestureListener listener)

重写

public boolean onTouchEvent(MotionEvent event) {
        return gd.onTouchEvent(event);
}

四、隐式启动

1、

启动浏览器

Intent intent = new Intent();
intent.setAction(Intent.ACTION_MAIN);

intent.addCategory(

        Intent.CATEGORY_APP_BROWSER);
startActivity(intent);

2、同时设置Action和DATA属性

public Intent  setData(Uri data);

public static Uri parse(String uriString)