DialogUtil

获取窗口-设置ContentView WindowManger-设置参数
dialog.getWindow().setAttributes(params)

final AlertDialog dialog = new AlertDialog.Builder(context).create();    dialog.show();

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Window window = dialog.getWindow();
window.setContentView(v);

    WindowManager m = ((Activity) context).getWindowManager();    Display display = m.getDefaultDisplay();        WindowManager.LayoutParams params = dialog.getWindow().getAttributes();    params.width = (int) (display.getWidth() * 0.8);    dialog.getWindow().setAttributes(params);

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