Question

我有3个观点：

GLSurfaceView
自定义SurfaceView
查看
- GLSurfaceView位于底部
- 自定义SurfaceView应位于顶部
- 视图位于上方和底部

这是我的代码：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    GameGlSurfaceView gameGlSurfaceView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        gameGlSurfaceView = new GameGlSurfaceView(this);
        setContentView(gameGlSurfaceView);

        View hudView = getLayoutInflater().inflate(R.layout.activity_main, null);
        addContentView(hudView, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT));

        View inpudPadView = getLayoutInflater().inflate(R.layout.input_pad, null);
        LinearLayout.LayoutParams inpudPadViewParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
        inpudPadViewParams.gravity = Gravity.TOP;
        addContentView(inpudPadView, inpudPadViewParams);
    }
}

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class SurfacePanel extends SurfaceView implements SurfaceHolder.Callback {

    Context context;
    Bitmap bitmapTest;
    MyThread mythread;

    public SurfacePanel(Context ctx, AttributeSet attrSet   ) {
        super(ctx, attrSet);

        context = ctx;

        bitmapTest = Bitmap.createBitmap(200, 100, Bitmap.Config.ARGB_8888);
        bitmapTest.eraseColor(Color.TRANSPARENT);

        SurfaceHolder holder = getHolder();
        holder.addCallback(this);
    }

    void doDraw(Canvas canvas) {
        canvas.drawColor(Color.GREEN);
        canvas.drawBitmap(bitmapTest, 50, 10, null);
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        mythread = new MyThread(holder, context,this);
        mythread.setRunning(true);
        mythread.start();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        mythread.setRunning(false);
        boolean retry = true;

        while(retry) {

            try {
                mythread.join();
                retry = false;
            }

            catch(Exception e) {
            }
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="de.batechniks.surfaceviewtest.MainActivity">

    <de.batechniks.surfaceviewtest.SurfacePanel
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView"/>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:baselineAligned="false"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:gravity="left">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/bt_down"
            android:src="@mipmap/ic_launcher"
            android:layout_gravity="bottom"/>

</LinearLayout>

结果是：我可以看到GLSurfaceView，我可以在底部看到上面的视图。在顶部，我只看到textview＆＃34; Large Text＆＃34;。 SurfaceView未显示。当我取消注释setContentView(gameGlSurfaceView)时，会显示SurfaceView。

主要问题是显示SurfaceView，第二个问题是将SurfaceView透明化。

非常感谢

Answer 1

您需要调用方法

this.setZOrderOnTop(true);

在你的构造函数中。

建议在像这样的自定义视图中执行构造函数

public SurfacePanel (Context context) {
    super(context);
    init();
}

public SurfacePanel (Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
}

public SurfacePanel (Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init();
}

@TargetApi(21)
public SurfacePanel (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);
    init();
}

private void init() {
    if(!isInEditMode()) {
        this.setZOrderOnTop(true);
    }
}

我无法在Android

1 个答案: