Android开发中控制UI界面的方式

Android开发中控制UI界面的方式

1.使用XML布局文件控制UI界面（推荐）

    2.在Java代码中控制UI界面

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        FrameLayout frameLayout=new FrameLayout(this);
        frameLayout.setBackgroundResource(R.mipmap.bg);
        setContentView(frameLayout);

        TextView textView=new TextView(this);
        textView.setText("开始游戏");
        textView.setTextSize(TypedValue.COMPLEX_UNIT_SP,18);
        textView.setTextColor(Color.rgb(17,85,114));
        FrameLayout.LayoutParams params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
        params.gravity= Gravity.CENTER;
        textView.setLayoutParams(params);

        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new AlertDialog.Builder(MainActivity.this).setTitle("系统提示")
                        .setMessage("游戏有风险，进入需谨慎，真的要进入吗？")
                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                Log.i("桌面台球","进入游戏");
                            }
                        }).setNegativeButton("退出", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Log.i("桌面台球","退出游戏");
                        finish();//结束当前的activity
                    }
                }).show();
            }
        });
        frameLayout.addView(textView);
    }
}

 3.使用XML和Java代码混合控制UI界面

 

public class MainActivity extends AppCompatActivity {

    private ImageView[] img=new ImageView[12];
    private int[] imagePath=new int[]{
            R.mipmap.img1,R.mipmap.img2,R.mipmap.img3,R.mipmap.img4,
            R.mipmap.img5,R.mipmap.img6,R.mipmap.img7,R.mipmap.img8,
            R.mipmap.img9,R.mipmap.img10,R.mipmap.img11,R.mipmap.img12,
    };


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

        GridLayout gridLayout=findViewById(R.id.layout);
        for(int i=0;i<imagePath.length;i++){
            img[i]=new ImageView(MainActivity.this);
            img[i].setImageResource(imagePath[i]);
            img[i].setPadding(2,2,2,2);
            ViewGroup.LayoutParams params=new ViewGroup.LayoutParams(130,80);
            img[i].setLayoutParams(params);
            gridLayout.addView(img[i]);
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<GridLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/layout"
    android:orientation="horizontal"
    android:rowCount="3"
    android:columnCount="4"
    tools:context=".MainActivity">


</GridLayout>

4.开发自定义的View

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@mipmap/img1"
    android:id="@+id/mylayout"
    tools:context=".MainActivity">

</FrameLayout>

 

public class RabbitView extends View {
    public float bitmapx,bitmapy;
    public RabbitView(Context context) {
        super(context);
        bitmapx=290;
        bitmapy=130;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        Paint paint=new Paint();
        Bitmap bitmap= BitmapFactory.decodeResource(this.getResources(),R.mipmap.rabbit);
        canvas.drawBitmap(bitmap,bitmapx,bitmapy,paint);
        if(bitmap.isRecycled()){
            bitmap.recycle();
        }
    }
}

 

public class MainActivity extends AppCompatActivity {

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

        FrameLayout frameLayout=findViewById(R.id.mylayout);
        final RabbitView rabbitView=new RabbitView(this);
        rabbitView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
               rabbitView.bitmapx=event.getX();
               rabbitView.bitmapy=event.getY();
               rabbitView.invalidate();
                return false;
            }
        });
        frameLayout.addView(rabbitView);
    }
}