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)