旺仔：查看手机分辨率

package com.hanqi.myintent;

import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.WindowManager;
import android.widget.TextView;

import java.util.List;

public class TestActivity1 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test1);
        final PackageManager packageManager = this.getPackageManager();
        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        final List<ResolveInfo> apps = packageManager.queryIntentActivities(mainIntent, 0);
        WindowManager windowManager = getWindowManager();
          Display display = windowManager.getDefaultDisplay();
        int screenWidth = screenWidth = display.getWidth();
        int screenHeight = screenHeight = display.getHeight();
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        TextView tv = (TextView)this.findViewById(R.id.tv);
        float width=dm.widthPixels*dm.density;
        float height=dm.heightPixels*dm.density;
        tv.setText("First method:"+dm.toString()+"\n"+"Second method:"+"Y="+screenWidth+";X="+screenHeight);

    }
}