首页实现页面切换

2021-05-25 18:31:26 +08:00
parent 39ca9da5e9
commit 4b28f19d9a
88 changed files with 1071 additions and 127 deletions
--- a/app/src/main/java/com/example/myapplication/util/SoftHideKeyBoardUtil.java
+++ b/app/src/main/java/com/example/myapplication/util/SoftHideKeyBoardUtil.java
@@ -0,0 +1,66 @@
+package com.example.myapplication.util;
+
+import android.app.Activity;
+import android.graphics.Rect;
+import android.os.Build;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.widget.FrameLayout;
+
+/**
+ * 2021 5 25
+ */
+
+public class SoftHideKeyBoardUtil {
+    public static void assistActivity(Activity activity) {
+        new SoftHideKeyBoardUtil(activity);
+    }
+
+    private View mChildOfContent;
+    private int usableHeightPrevious;
+    private FrameLayout.LayoutParams frameLayoutParams; //为适应华为小米等手机键盘上方出现黑条或不适配
+    private int contentHeight;//获取setContentView本来view的高度
+    private boolean isfirst = true;//只用获取一次
+    private int statusBarHeight;//状态栏高度
+
+    private SoftHideKeyBoardUtil(Activity activity) { //1､找到Activity的最外层布局控件，它其实是一个DecorView,它所用的控件就是FrameLayout
+        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content); //2､获取到setContentView放进去的View
+        mChildOfContent = content.getChildAt(0); //3､给Activity的xml布局设置View树监听，当布局有变化，如键盘弹出或收起时，都会回调此监听
+        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { //4､软键盘弹起会使GlobalLayout发生变化
+            public void onGlobalLayout() {
+                if (isfirst) {
+                    contentHeight = mChildOfContent.getHeight();//兼容华为等机型
+                    isfirst = false;
+                }  //5､当前布局发生变化时，对Activity的xml布局进行重绘
+                possiblyResizeChildOfContent();
+            }
+        }); //6､获取到Activity的xml布局的放置参数
+        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
+    } // 获取界面可用高度，如果软键盘弹起后，Activity的xml布局可用高度需要减去键盘高度
+
+    private void possiblyResizeChildOfContent() { //1､获取当前界面可用高度，键盘弹起后，当前界面可用布局会减少键盘的高度
+        int usableHeightNow = computeUsableHeight(); //2､如果当前可用高度和原始值不一样
+        if (usableHeightNow != usableHeightPrevious) {  //3､获取Activity中xml中布局在当前界面显示的高度
+            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();  //4､Activity中xml布局的高度-当前可用高度
+            int heightDifference = usableHeightSansKeyboard - usableHeightNow;  //5､高度差大于屏幕1/4时，说明键盘弹出
+            if (heightDifference > (usableHeightSansKeyboard / 4)) {  // 6､键盘弹出了，Activity的xml布局高度应当减去键盘高度
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+                    frameLayoutParams.height = usableHeightSansKeyboard - heightDifference + statusBarHeight;
+                } else {
+                    frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
+                }
+            } else {
+                frameLayoutParams.height = contentHeight;
+            }  //7､ 重绘Activity的xml布局
+            mChildOfContent.requestLayout();
+            usableHeightPrevious = usableHeightNow;
+        }
+    }
+
+    private int computeUsableHeight() {
+        Rect r = new Rect();
+        mChildOfContent.getWindowVisibleDisplayFrame(r); // 全屏模式下：直接返回r.bottom，r.top其实是状态栏的高度
+        return (r.bottom - r.top);
+    }
+
+}
--- a/app/src/main/java/com/example/myapplication/util/SoftKeyboardStateHelper.java
+++ b/app/src/main/java/com/example/myapplication/util/SoftKeyboardStateHelper.java
@@ -0,0 +1,94 @@
+package com.example.myapplication.util;
+
+import android.graphics.Rect;
+import android.view.View;
+import android.view.ViewTreeObserver;
+
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Created by yzb_android on
+ * 作用：监听软键盘
+ */
+
+public class SoftKeyboardStateHelper 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 SoftKeyboardStateHelper(View activityRootView) {
+        this(activityRootView, false);
+    }
+
+    public SoftKeyboardStateHelper(View activityRootView, boolean isSoftKeyboardOpened) {
+        this.activityRootView     = activityRootView;
+        this.isSoftKeyboardOpened = isSoftKeyboardOpened;
+        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);
+    }
+
+    @Override
+    public void onGlobalLayout() {
+        final Rect r = new Rect();
+        //r will be populated with the coordinates of your view that area still visible.
+        activityRootView.getWindowVisibleDisplayFrame(r);
+
+        final int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
+        if (!isSoftKeyboardOpened && heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
+            isSoftKeyboardOpened = true;
+            notifyOnSoftKeyboardOpened(heightDiff);
+        } else if (isSoftKeyboardOpened && heightDiff < 100) {
+            isSoftKeyboardOpened = false;
+            notifyOnSoftKeyboardClosed();
+        }
+    }
+
+    public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) {
+        this.isSoftKeyboardOpened = isSoftKeyboardOpened;
+    }
+
+    public boolean isSoftKeyboardOpened() {
+        return isSoftKeyboardOpened;
+    }
+
+    /**
+     * Default value is zero (0)
+     * @return last saved keyboard height in px
+     */
+    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();
+            }
+        }
+    }
+}
--- a/app/src/main/java/com/example/myapplication/util/Whetherisempty.java
+++ b/app/src/main/java/com/example/myapplication/util/Whetherisempty.java
@@ -0,0 +1,26 @@
+package com.example.myapplication.util;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+//去掉空的字符
+public class Whetherisempty {
+    public static String getClfz(String s) throws JSONException {
+        JSONObject jsonObject = new JSONObject(s);
+        if (String.valueOf(jsonObject.get("result")).equals("[]") || String.valueOf(jsonObject.get("result")).equals("")) {
+            jsonObject.put("result", null);
+            return jsonObject.toString();
+        } else {
+            return s;
+        }
+    }
+
+    public static String getCl(String s) {
+        String s2 = s.substring(s.length() - 3, s.length() - 1);
+        if (s2.equals("[]") || s2.equals("")) {
+            return s.substring(0, s.lastIndexOf(",")) + "}";
+        } else {
+            return s;
+        }
+    }
+}