如何为不同的OnClick方法放置多个viewPager.setCurrentItem（位置）？

Question

让我们说活动A有5个按钮。每个按钮都会转到活动B，这是一个带有5个选项卡的选项卡式活动。当我点击button1时，我希望它带你到tab1，button2 = tab2，button3 = tab3等。我正在使用setCurrentItem，但它只适用于第一个和最后一个按钮。中间的其余部分将带您到tab1。 我需要什么代码，所以button2会把我带到tab2。我是否需要以及是否需要声明？非常感谢帮助。

ActivityA.java

  public void Button1(View view) {
    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab1", 0);  //2 or whatever you want
    startActivity(intent);
}

public void Button2(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab2", 1);  //2 or whatever you want
    startActivityForResult(intent, 0);


}

public void Button3(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab3", 2);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Button4(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab4", 3);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Button5(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab5", 4);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

ActivityB.java

final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);

    final int position1 = getIntent().getExtras().getInt("Tab1");

    final int position3 = getIntent().getExtras().getInt("Tab3");
    final int position2 = getIntent().getExtras().getInt("Tab2");
    final int position4 = getIntent().getExtras().getInt("Tab4");

    final int position5 = getIntent().getExtras().getInt("Tab5");


    PagerAdapter adapter = new PagerAdapter
            (getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);

    {
        viewPager.setCurrentItem(position1);
    }
    {
        viewPager.setCurrentItem(position3);
    }
    {
        viewPager.setCurrentItem(position2);
    }

    {
        viewPager.setCurrentItem(position4);
    }

    {

        viewPager.setCurrentItem(position5);
    }

Answer 1

您将意图中的值放在不同的键中。改为使用相同的键：
活动1：

public void Button1(View view) {
    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("position", 0);  //2 or whatever you want
    startActivity(intent);
}

public void Button2(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("position", 1);  //2 or whatever you want
    startActivityForResult(intent, 0);
}

public void Button3(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("position", 2);  //2 or whatever you want
    startActivityForResult(intent, 0);
}

public void Button4(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("position", 3);  //2 or whatever you want
    startActivityForResult(intent, 0);
}

public void Button5(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("position", 4);  //2 or whatever you want
    startActivityForResult(intent, 0);
}

活性2：

    final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
PagerAdapter adapter = new PagerAdapter
        (getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.setCurrentItem(getIntent().getExtras().getInt("position",0));

Answer 2

请不要使用 startActivityForResult 您只能使用一个键来传递意图中的标签索引，例如

    public void Button1(View view) {
        Intent intent = new Intent(view.getContext(), TabbedActivity.class);
        intent.putExtra("tabIndex", 0);  
        startActivity(intent);
    }
 public void Button2(View view) {
        Intent intent = new Intent(view.getContext(), TabbedActivity.class);
        intent.putExtra("tabIndex", 1);  
        startActivity(intent);
    }
 public void Button3(View view) {
        Intent intent = new Intent(view.getContext(), TabbedActivity.class);
        intent.putExtra("tabIndex", 2);  
        startActivity(intent);
    }
 public void Button4(View view) {
        Intent intent = new Intent(view.getContext(), TabbedActivity.class);
        intent.putExtra("tabIndex", 3);  
        startActivity(intent);
    }

在activityb get

final int position = getIntent().getExtras().getInt("tabIndex");
PagerAdapter adapter = new PagerAdapter
            (getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);
     viewPager.setCurrentItem(position);

Answer 3

试试这个

public void Button1(View view) {
    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("tabPosition", 0);  //2 or whatever you want
    startActivity(intent);
}

public void Button2(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("tabPosition", 1);  //2 or whatever you want
    startActivityForResult(intent, 0);


}

public void Button3(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("tabPosition", 2);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Button4(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("tabPosition", 3);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Button5(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("tabPosition", 4);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

然后在你的视图分页器类

中

final int currentPosition = getIntent().getExtras().getInt("tabPosition");

像这样设置您的视图

PagerAdapter adapter = new PagerAdapter
            (getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);
    viewPager.setCurrentItem(currentPosition);

Answer 4

You need to set only one tag in putextras. Like this
 public void Button1(View view) {
    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab", 0);  //2 or whatever you want
    startActivity(intent);
}

public void Button2(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab", 1);  //2 or whatever you want
    startActivityForResult(intent, 0);


}

public void Button3(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab", 2);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Button4(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab", 3);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Button5(View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("Tab", 4);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

然后在第二个活动中，您只需获得一个值。像这样：

最终ViewPager viewPager =（ViewPager）findViewById（R.id.pager）;

final int position = getIntent().getExtras().getInt("Tab");



PagerAdapter adapter = new PagerAdapter
        (getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
    viewPager.setCurrentItem(position);

希望这会对你有所帮助。

Answer 5

不是为每个ButtonView使用不同的键值，而是使用单个键并在位置变量中获取值，只需在单个整数变量中获取值，并使用该变量设置currentIten。

e.g。 活动A：

public void PcHealth (View view) {
    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("TabPosition", 0);  //2 or whatever you want
    startActivity(intent);
}

public void Wifi (View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("TabPosition", 1);  //2 or whatever you want
    startActivityForResult(intent, 0);


}

public void Misc (View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("TabPosition", 2);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void HowTo (View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("TabPosition", 3);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

public void Shortcut (View view) {

    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    intent.putExtra("TabPosition", 4);  //2 or whatever you want
    startActivityForResult(intent, 0);

}

ActivityB.java：

final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);

    final int position = getIntent().getExtras().getInt("TabPosition");


    PagerAdapter adapter = new PagerAdapter
            (getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);

  viewPager.setCurrentItem(poisition);