Android开发启动页跳过倒计时效果

app启动页都会放些广告图，然后倒计时跳过。

一、思路：

不是很难，就用用个倒计时控制mHandler.sendEmptyMessageDelayed(WHAT_COUNT_DOWN, 100);

二、效果图：

三、关键代码：

public class MainActivity extends AppCompatActivity {

    private static final int WHAT_COUNT_DOWN = 1;

    private CircleProgress mCircleProgress;
    private ImageView mIvAd;

    private int mMaxProgressVal;
    private int mCurProgressVal;
    private List<AdBean> mAdList;
    private int mAdIndex;
    private int mInterval = 2000;

    private Handler mHandler;
    private Context mContext;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
        mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what) {
                    case WHAT_COUNT_DOWN:
                        updateCountDown();
                        break;
                }
            }
        };
        mCircleProgress = findViewById(R.id.progress);
        mIvAd = findViewById(R.id.iv_ad);
        //数据处理，一般是接口返回的,正常是不会有resImage本地图片的
        mAdList = new ArrayList<>();
        mAdList.add(new AdBean("","",R.mipmap.head1));
        mAdList.add(new AdBean("","",R.mipmap.head2));
        mAdList.add(new AdBean("","",R.mipmap.head3));
        mAdList.add(new AdBean("","",R.mipmap.head5));

        mMaxProgressVal = 4 * mInterval;
        if (mCircleProgress != null) {
            mCircleProgress.setMaxProgress(mMaxProgressVal);
        }
        if (mHandler != null) {
            mIvAd.setImageResource(mAdList.get(3).getResImage());
            mHandler.sendEmptyMessageDelayed(WHAT_COUNT_DOWN, 100);
        }
    }

    private void updateCountDown() {
        mCurProgressVal += 100;
        if (mCurProgressVal > mMaxProgressVal) {
            return;
        }
        if (mCircleProgress != null) {
            mCircleProgress.setCurProgress(mCurProgressVal);
        }
        int index = mCurProgressVal / mInterval;
        if (index < mAdList.size() && mAdIndex != index) {
            mIvAd.setImageResource(mAdList.get(mAdIndex).getResImage());
            mAdIndex = index;
        }
        if (mCurProgressVal < mMaxProgressVal) {
            if (mHandler != null) {
                mHandler.sendEmptyMessageDelayed(WHAT_COUNT_DOWN, 100);
            }
        } else if (mCurProgressVal == mMaxProgressVal) {
            Toast.makeText(mContext,"倒计时完了，做下一步操作",Toast.LENGTH_SHORT).show();
        }
    }

}

四、项目demo源码结构图：

有问题或者需要完整源码的私信我