使用 Thread 使 ImageView 数组中的元素可见

Question

我有一个 ImageView 的数组，其中包含许多我想按顺序显示的不可见元素（即，使第一个可见，等待半秒钟，使下一个可见，然后依此类推）使用 Thread 或 runOnUiThread.

我试过以下方法：

Thread th = new Thread(new Runnable() {
    @Override
    public void run() {
        try {
            Thread.sleep(500);
            im1.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im2.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im3.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im4.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im5.setVisibility(View.VISIBLE);
            Thread.sleep(1000);
            bottom.setVisibility(View.VISIBLE);                 
        } catch (Exception e) {
            Log.e("ERR", e.getMessage());
        }
    }
});
th.start();

和

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        try {
            Thread.sleep(500);
            im1.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im2.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im3.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im4.setVisibility(View.VISIBLE);
            Thread.sleep(500);
            im5.setVisibility(View.VISIBLE);
            Thread.sleep(1000);
            bottom.setVisibility(View.VISIBLE);
        } catch (Exception e) {
            Log.e("ERR", e.getMessage());
        }
    }
});

但是我没有得到想要的效果。发生的情况是所有图像同时可见，而不是一个接一个地显示。

我该如何解决这个问题？

Answer 1

int counter=1; //Global variable

private void visibleImageview()
    {
        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {

                if(counter==1)
                {
                     im1.setVisibility(View.VISIBLE);
                }
                else if(counter==2)
                {
                    im2.setVisibility(View.VISIBLE);
                }
                else if(counter==3)
                {
                    im3.setVisibility(View.VISIBLE);
                }


                ++counter;
                if(couter<=3)
                visibleImageview();
            }
        }, 3000);
    }

Answer 2

解决了。这就是我设法做到的：

Handler handler = new Handler();
im1.setVisibility(View.VISIBLE);
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                im2.setVisibility(View.VISIBLE);
            }
        });

    }
},500);

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                im3.setVisibility(View.VISIBLE);
            }
        });

    }
},1000);

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                im4.setVisibility(View.VISIBLE);
            }
        });

    }
},1500);

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                im4.setVisibility(View.VISIBLE);
            }
        });

    }
},2000);

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                bottom.setVisibility(View.VISIBLE);
            }
        });

    }
},3000);

使用 Thread 使 ImageView 数组中的元素可见

Make elements in ImageView array visible using Thread

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