Android：如何设置底部控件View随着输入法上下移动

1.设置布局随着软键盘的弹出而上移

描述：在点击文本框输入文字时，如何设置界面底部控件随着软键盘的弹出而上移。（非整体界面上移哦）具体效果如下面图所示： 键盘弹起效果图.jpeg 键盘隐藏效果图.png

这种效果是如何做到的呢

其实要完成这样的效果很简单，首先要监听输入法的弹起与消失，其次根据输入法状态调用。view.requestLayout

输入法监听

public class SoftKeyBroadManager implements ViewTreeObserver.OnGlobalLayoutListener {

    public interface SoftKeyboardStateListener {
        void onSoftKeyboardOpened(int keyboardHeightInPx);

        void onSoftKeyboardClosed();
    }

    private final List<SoftKeyboardStateListener> listeners = new LinkedList<SoftKeyboardStateListener>();
    private final View activityRootView;
    private int lastSoftKeyboardHeightInPx;
    private boolean isSoftKeyboardOpened;

    public SoftKeyBroadManager(View activityRootView) {
        this(activityRootView, false);
    }

    public SoftKeyBroadManager(View activityRootView, boolean isSoftKeyboardOpened) {
        this.activityRootView = activityRootView;
        this.isSoftKeyboardOpened = isSoftKeyboardOpened;
        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);
    }

    @Override
    public void onGlobalLayout() {
        final Rect r = new Rect();
        activityRootView.getWindowVisibleDisplayFrame(r);

        final int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);

        if (!isSoftKeyboardOpened && heightDiff > 500) {
            // 如果高度超过500 键盘可能被打开
            isSoftKeyboardOpened = true;
            notifyOnSoftKeyboardOpened(heightDiff);
        } else if (isSoftKeyboardOpened && heightDiff < 500) {
            isSoftKeyboardOpened = false;
            notifyOnSoftKeyboardClosed();
        }
    }

    public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) {
        this.isSoftKeyboardOpened = isSoftKeyboardOpened;
    }

    public boolean isSoftKeyboardOpened() {
        return isSoftKeyboardOpened;
    }


    public int getLastSoftKeyboardHeightInPx() {
        return lastSoftKeyboardHeightInPx;
    }

    public void addSoftKeyboardStateListener(SoftKeyboardStateListener listener) {
        listeners.add(listener);
    }

    public void removeSoftKeyboardStateListener(SoftKeyboardStateListener listener) {
        listeners.remove(listener);
    }

    private void notifyOnSoftKeyboardOpened(int keyboardHeightInPx) {
        this.lastSoftKeyboardHeightInPx = keyboardHeightInPx;

        for (SoftKeyboardStateListener listener : listeners) {
            if (listener != null) {
                listener.onSoftKeyboardOpened(keyboardHeightInPx);
            }
        }
    }

    private void notifyOnSoftKeyboardClosed() {
        for (SoftKeyboardStateListener listener : listeners) {
            if (listener != null) {
                listener.onSoftKeyboardClosed();
            }
        }
    }
}

Activity中使用，并调用view的requestLayout（）

public class MainActivity extends AppCompatActivity {

    private LinearLayout mBottomView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        View root = findViewById(R.id.root);
        mBottomView = findViewById(R.id.bottom);
        SoftKeyBroadManager softKeyBroadManager = new SoftKeyBroadManager(root);
        softKeyBroadManager.addSoftKeyboardStateListener(softKeyboardStateListener);
    }

    SoftKeyBroadManager.SoftKeyboardStateListener softKeyboardStateListener = new SoftKeyBroadManager.SoftKeyboardStateListener() {

        @Override
        public void onSoftKeyboardOpened(int keyboardHeightInPx) {
            mBottomView.requestLayout();
        }

        @Override
        public void onSoftKeyboardClosed() {
            mBottomView.requestLayout();
        }
    };
}

注意事项

（1）在清单文件中给activity设置属性android:windowSoftInputMode="adjustResize"一些不必要的属性不要随意添加，以免影响实现功能效果。
（2）底部控件View设置为android:layout_alignParentBottom="true"
（3）需要根据输入法状态设置view.requestLayout();