Android中软键盘使用总结(一)

1.通过代码方式隐藏软键盘.

((InputMethodManager) getSystemService(INPUT_METHOD_SERVICE)) .hideSoftInputFromWindow(getCurrentFocus()
.getWindowToken(),InputMethodManager.HIDE_NOT_ALWAYS);

2.通过代码方式开启软件盘.

InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);

if (imm.isActive()) {
imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT, InputMethodManager.HIDE_NOT_ALWAYS);
}

3.如何禁止软键盘弹出.

1).在XML文件里添加一个TextView
譬如： android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusableInTouchMode="true"/>
注：android:focusableInTouchMode="true"一定要有

2). TextView tv = (TextView) findViewById(R.id.textview);

tv.requestFocus();

4.如何获取软键盘高度.

1).全局变量
private RelativeLayout rl;//父布局id
private int statusBarHeight;

2).
final Context context = getApplicationContext();
rl.getViewTreeObserver(). addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
// r will be populated with the coordinates of your view that area still visible.
rl.getWindowVisibleDisplayFrame(r);
int screenHeight = rl.getRootView().getHeight();
int heightDiff = screenHeight - (r.bottom - r.top);
if (heightDiff > 100)
statusBarHeight = 0;
try {
Class<?> c = Class.forName("com.android.internal.R$dimen");
Object obj = c.newInstance();
Field field = c.getField("status_bar_height");
int x = Integer.parseInt(field.get(obj).toString());
statusBarHeight = context.getResources().getDimensionPixelSize(x);
} catch (Exception e) {
e.printStackTrace();
}
int realKeyboardHeight = heightDiff - statusBarHeight;

Log.i("print","软键盘高度: " + realKeyboardHeight);
}
});

5.如何监听软键盘的弹出与隐藏状态.

1).最外层父布局.
rl = (RelativeLayout) findViewById(R.id.rl);

2).下面这些代码不要在onCreate()方法里：

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);

rl.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {

int heightDiff = rl.getRootView().getHeight() - rl.getHeight();
if (heightDiff > 200) {

弹出的时候处理的逻辑

} else {

隐藏的时候处理的逻辑
}
}
});

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