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最新推荐文章于 2018-11-20 15:59:56 发布

原创最新推荐文章于 2018-11-20 15:59:56 发布 · 586 阅读

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本文介绍如何在Android项目中引入DragGrid库并实现列表项的拖拽功能。通过在build.gradle文件中配置依赖源并引入指定版本的DragGrid库，可以在MainActivity中创建包含拖拽功能的列表。此外，文章还展示了如何保存拖拽后的数据状态。





导入包
在项目跟目录下build.gradle中的allprojects中加入maven {url"https://jitpack.io"}

allprojects {
    repositories {
        jcenter()
        maven {url"https://jitpack.io"}
    }
}
导包：
compile 'com.github.yekh:draggrid:v1.0.1'

main_activity.xml中的代码
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.andy.pindaoguanli.MainActivity">    <Button        android:id="@+id/but"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Hello World!" /></RelativeLayout>
MainActivity中代码：
public class MainActivity extends AppCompatActivity {

    private Button but;
    private String stringExtra;
    private SharedPreferences sp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        but = (Button) findViewById(R.id.but);
        sp = getSharedPreferences("set", MODE_PRIVATE);

        but.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String data = sp.getString("data", null);
                if (data == null) {
                   List<ChannelBean> list = new ArrayList<ChannelBean>();
                    for (int i = 0; i < 15; i++) {
                        ChannelBean bean = null;
                        if (i < 5) {
                            bean = new ChannelBean("item" + i, true);
                        } else {
                            bean = new ChannelBean("item" + i, false);
                        }
                        list.add(bean);
                    }
                    ChannelActivity.startChannelActivity(MainActivity.this, list);
                }else {
                    ChannelActivity.startChannelActivity(MainActivity.this, data);
                }

            }
        });
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == ChannelActivity.REQUEST_CODE && resultCode == ChannelActivity.RESULT_CODE) {

            stringExtra = data.getStringExtra(ChannelActivity.RESULT_JSON_KEY);

            sp.edit().putString("data", stringExtra).commit();
            Log.e("stringExtra", stringExtra);
        }
    }
}