Question

我在Android Eclipse上有这个代码，我需要缩短代码以减小文件大小我认为可以使用for方法缩短代码，但我是业余爱好者：

        Button P1 = (Button) findViewById(R.id.Part1);
    Button P2 = (Button) findViewById(R.id.Part2);
    Button P3 = (Button) findViewById(R.id.Part3);
    Button P4 = (Button) findViewById(R.id.Part4);
    Button P5 = (Button) findViewById(R.id.Part5);
    Button P6 = (Button) findViewById(R.id.Part6);
    Button P7 = (Button) findViewById(R.id.Part7);
    Button P8 = (Button) findViewById(R.id.Part8);
    Button P9 = (Button) findViewById(R.id.Part9);
    Button P10 = (Button) findViewById(R.id.Part10);
    Button P11 = (Button) findViewById(R.id.Part11);
    Button P12 = (Button) findViewById(R.id.Part12);
    Button P13 = (Button) findViewById(R.id.Part13);
    Button P14 = (Button) findViewById(R.id.Part14);
    Button P15 = (Button) findViewById(R.id.Part15);
    Button P16 = (Button) findViewById(R.id.Part16);
    Button P17 = (Button) findViewById(R.id.Part17);
    Button P18 = (Button) findViewById(R.id.Part18);
    Button P19 = (Button) findViewById(R.id.Part19);
    Button P20 = (Button) findViewById(R.id.Part20);
    Button P21 = (Button) findViewById(R.id.Part21);
    Button P22 = (Button) findViewById(R.id.Part22);
    Button P23 = (Button) findViewById(R.id.Part23);
    Button P24 = (Button) findViewById(R.id.Part24);
    Button P25 = (Button) findViewById(R.id.Part25);
    Button P26 = (Button) findViewById(R.id.Part26);
    Button P27 = (Button) findViewById(R.id.Part27);
    Button P28 = (Button) findViewById(R.id.Part28);
    Button P29 = (Button) findViewById(R.id.Part29);
    Button P30 = (Button) findViewById(R.id.Part30);
    Button P31 = (Button) findViewById(R.id.Part31);
    Button P32 = (Button) findViewById(R.id.Part32);
    Button P33 = (Button) findViewById(R.id.Part33);
    Button P34 = (Button) findViewById(R.id.Part34);
    Button P35 = (Button) findViewById(R.id.Part35);
    Button P36 = (Button) findViewById(R.id.Part36);
    Button P37 = (Button) findViewById(R.id.Part37);
    Button P38 = (Button) findViewById(R.id.Part38);
    Button P39 = (Button) findViewById(R.id.Part39);
    Button P40 = (Button) findViewById(R.id.Part40);
    Button P41 = (Button) findViewById(R.id.Part41);
    Button P42 = (Button) findViewById(R.id.Part42);
    Button P43 = (Button) findViewById(R.id.Part43);
    Button P44 = (Button) findViewById(R.id.Part44);
    Button P45 = (Button) findViewById(R.id.Part45);
    Button P46 = (Button) findViewById(R.id.Part46);
    Button P47 = (Button) findViewById(R.id.Part47);
    Button P48 = (Button) findViewById(R.id.Part48);
    Button P49 = (Button) findViewById(R.id.Part49);
    Button P50 = (Button) findViewById(R.id.Part50);
    Button P51 = (Button) findViewById(R.id.Part51);
    Button P52 = (Button) findViewById(R.id.Part52);
    Button P53 = (Button) findViewById(R.id.Part53);
    Button P54 = (Button) findViewById(R.id.Part54);
    Button P55 = (Button) findViewById(R.id.Part55);
    Button P56 = (Button) findViewById(R.id.Part56);
    Button P57 = (Button) findViewById(R.id.Part57);
    Button P58 = (Button) findViewById(R.id.Part58);
    Button P59 = (Button) findViewById(R.id.Part59);
    Button P60 = (Button) findViewById(R.id.Part60);
    Button P61 = (Button) findViewById(R.id.Part61);
    Button P62 = (Button) findViewById(R.id.Part62);
    Button P63 = (Button) findViewById(R.id.Part63);
    Button P64 = (Button) findViewById(R.id.Part64);
    Button P65 = (Button) findViewById(R.id.Part65);
    Button P66 = (Button) findViewById(R.id.Part66);
    Button P67 = (Button) findViewById(R.id.Part67);
    Button P68 = (Button) findViewById(R.id.Part68);
    Button P69 = (Button) findViewById(R.id.Part69);
    Button P70 = (Button) findViewById(R.id.Part70);
    Button P71 = (Button) findViewById(R.id.Part71);
    Button P72 = (Button) findViewById(R.id.Part72);
    Button P73 = (Button) findViewById(R.id.Part73);
    Button P74 = (Button) findViewById(R.id.Part74);
    Button P75 = (Button) findViewById(R.id.Part75);
    Button P76 = (Button) findViewById(R.id.Part76);
    Button P77 = (Button) findViewById(R.id.Part77);
    Button P78 = (Button) findViewById(R.id.Part78);
    Button P79 = (Button) findViewById(R.id.Part79);
    Button P80 = (Button) findViewById(R.id.Part80);
    Button P81 = (Button) findViewById(R.id.Part81);
    Button P82 = (Button) findViewById(R.id.Part82);
    Button P83 = (Button) findViewById(R.id.Part83);
    Button P84 = (Button) findViewById(R.id.Part84);
    Button P85 = (Button) findViewById(R.id.Part85);
    Button P86 = (Button) findViewById(R.id.Part86);
    Button P87 = (Button) findViewById(R.id.Part87);
    Button P88 = (Button) findViewById(R.id.Part88);
    Button P89 = (Button) findViewById(R.id.Part89);

非常感谢，我需要一个代码来缩短代码。

Answer 1

如果父布局仅包含您可以执行的按钮视图

for(int i = 0; i < layout.getChildCount(); i++) {
                        Button button = (Button)layout.getChildAt(i);
                    }

Answer 2

如果所有按钮共享通用类型的功能和UI，则应使用RecyclerView或某些ListView类型与适当的适配器。适配器适用于此类任务。请上传您应用的ScreenShots，以便更好地了解问题。但有一点可以肯定，找到90个按钮ID不是一个好方法。

Answer 3

您应该考虑使用ListView或RecyclerView进行列表布局。

或者让我们使用数据绑定。使用数据绑定，您可以避免使用findById方法。 https://developer.android.com/topic/libraries/data-binding/index.html

在build.gradle中：

android {
    ....
    dataBinding {
        enabled = true
    }
}

在您的布局文件中，使用以下标记：

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

   ... your original layout tags ...

</layout>

在java程序中，像这样使用DataBindingUtil：

MainActivityBinding binding;

@Override
protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   binding = DataBindingUtil.setContentView(this, R.layout.main_activity);

   //you can access buttons like this:
   binding.Part1.setOnClickListener(...);
}

许多相同的按钮代码（Short Then）

3 个答案: