android – 我应该使用什么代替getWidth()和getHeight()来知道宽度何时更大以及何时高度更大

参见英文答案 > Get screen dimensions in pixels                                    39个

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Display;
import android.view.WindowManager;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        FragmentManager fm=getFragmentManager();
        FragmentTransaction ft= fm.beginTransaction();


        WindowManager wm= getWindowManager();
        Display d=wm.getDefaultDisplay();

        if (d.getWidth()>d.getHeight())
        {
            Fragment1 f1 = new Fragment1();
            ft.replace(android.R.id.content, f1);
        }
        else
        {
            Fragment2 f2 = new Fragment2();
            ft.replace(android.R.id.content, f2);
        }
    ft.commit();
    }
}

我想在android中使用片段,并且当显示的宽度大于显示的高度时想要显示fragment1,当显示的高度大于显示的宽度时,想要显示fragment2但是当使用getWidth()和getHeight()时,android studio会说这些方法都被贬低了.
那么如何知道宽度何时更大以及何时高度更大？

解决方法:

使用DisplayMetrics而不是Display.

试试这个：

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Display;
import android.view.WindowManager;
import android.util.DisplayMetrics;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        FragmentManager fm=getFragmentManager();
        FragmentTransaction ft= fm.beginTransaction();

        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        int height = displayMetrics.heightPixels;
        int width = displayMetrics.widthPixels;

        if (width > height)
        {
            Fragment1 f1 = new Fragment1();
            ft.replace(android.R.id.content, f1);
        }
        else
        {
            Fragment2 f2 = new Fragment2();
            ft.replace(android.R.id.content, f2);
        }

        ft.commit();
    }
}

标签：android,fragment,display,window-managers,fragmentmanager
来源： https://codeday.me/bug/20190716/1474544.html