本例用到的布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <EditText
        android:id="@+id/editText"
        android:layout_width="300dp"
        android:layout_height="40dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="200dp"
        android:inputType="text"
        />

</LinearLayout>

主程序和用于获取屏幕高度和获取输入法高度的代码：

package com.toby.personal.testlistview;

import android.app.Activity;
import android.graphics.Rect;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.EditText;

public class MainActivity extends Activity {

    final private static String TAG = "Toby_Test";
    final private static int KeyboardHeightLimit = 200;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final EditText editText = (EditText) findViewById(R.id.editText);

        checkKeyboardHeight(editText);
    }

    private void checkKeyboardHeight(final View chatRootLayout) {
        chatRootLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect r = new Rect();

                chatRootLayout.getWindowVisibleDisplayFrame(r);

                final int screenHeight = chatRootLayout.getRootView().getHeight();
                Log.d(TAG, "screenHeight: " + screenHeight);
                final int keyboardHeight = screenHeight - (r.bottom);

                if (keyboardHeight > KeyboardHeightLimit) {
                    Log.d(TAG, "keyboardHeight: " + keyboardHeight);
                }
            }
        });
    }

}

运行效果图：

运行结果

参考链接：http://stackoverflow.com/questions/29665435/how-to-get-the-height-of-android-keyboard