Android(安卓)获取View高度的4种方法

1 通过 looper 队列

    /**     * 通过 looper 队列     */    private void getHeight1() {        tvText.post(new Runnable() {            @Override            public void run() {                int height = tvText.getHeight();                Log.i(TAG, "MainActivity;getHeight1;height=" + height);            }        });    }

2 当视图树的布局发生改变时

    /**     * 当视图树的布局发生改变时     */    private void getHeight2() {        tvText.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {            @Override            public void onGlobalLayout() {                tvText.getViewTreeObserver().removeOnGlobalLayoutListener(this);                int height = tvText.getHeight();                Log.i(TAG, "MainActivity;getHeight2;height=" + height);            }        });    }

3 当视图树的进行绘制时

    /**     * 当视图树的进行绘制时     */    private void getHeight3() {        tvText.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {            @Override            public boolean onPreDraw() {                tvText.getViewTreeObserver().removeOnPreDrawListener(this);                int height = tvText.getHeight();                Log.i(TAG, "MainActivity;getHeight3;height=" + height);                return false;            }        });    }

4 view 布局改变时

    /**     * view 布局改变时     */    private void getHeight4() {        tvText.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {            @Override            public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {                tvText.removeOnLayoutChangeListener(this);                int height = tvText.getHeight();                Log.i(TAG, "MainActivity;getHeight4;height=" + height);            }        });    }

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