Android N(7.0) 在ListView里显示EditText时软键盘弹出时会自动切换到全键盘的问题?

问题症状描述

1. Activity 在AndroidManifest.xml里设置android:windowSoftInputMode="adjustPan"
2. 在ListView里绘制Item
3. Item控件为EditText
4. EditText设置InputType为Number
5. 当在Android 7.0系统上，点击EditText时，弹出的软键盘为“数字”输入模式，但是瞬间就会切换到“全键盘”模式。

   在7.0之前的系统，都没有出现这种问题。

尝试性解决方案（风险未评估）

/** * 尝试性修复了在ListView里显示EditText InputType为 其它非text 类型时，弹出的软键盘会从数字键盘自动切换为 英文全键盘 的问题。 */class ListViewEx2 extends ListView{public ListViewEx2(final Context context){    super(context);}public ListViewEx2(final Context context, final AttributeSet attrs){    super(context, attrs);}public ListViewEx2(final Context context, final AttributeSet attrs, final int defStyleAttr){    super(context, attrs, defStyleAttr);}@TargetApi(Build.VERSION_CODES.LOLLIPOP)public ListViewEx2(final Context context, final AttributeSet attrs, final int defStyleAttr, final int defStyleRes){    super(context, attrs, defStyleAttr, defStyleRes);}@Overrideprotected void onLayout(final boolean changed, final int l, final int t, final int r, final int b){    //XXX：经过初步测试，只有在Android 7.0平台以上的系统才会出现软键盘自动切换的问题。    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && changed)        super.onLayout(changed, l, t, r, b);    else        super.onLayout(changed, l, t, r, b);}}

ListView.java 源码对比

Android 7.0 部分可疑的改动过的源码

private class FocusSelector implements Runnable {    // the selector is waiting to set selection on the list view    private static final int STATE_SET_SELECTION = 1;    // the selector set the selection on the list view, waiting for a layoutChildren pass    private static final int STATE_WAIT_FOR_LAYOUT = 2;    // the selector's selection has been honored and it is waiting to request focus on the    // target child.    private static final int STATE_REQUEST_FOCUS = 3;    public void run() {        if (mAction == STATE_SET_SELECTION) {            setSelectionFromTop(mPosition, mPositionTop);            mAction = STATE_WAIT_FOR_LAYOUT;        } else if (mAction == STATE_REQUEST_FOCUS) {            final int childIndex = mPosition - mFirstPosition;            final View child = getChildAt(childIndex);            if (child != null) {                child.requestFocus();            }            mAction = -1;        }    }    }}

Android 6.0 部分可疑的改动过的对应旧版本源码

private class FocusSelector implements Runnable {           public void run() {        setSelectionFromTop(mPosition, mPositionTop);    }    }

参考资料