如何从 Android GridView onItemClick 添加新活动？答案

【问题标题】：How to add New Activity from Android GridView onItemClick?如何从 Android GridView onItemClick 添加新活动？
【发布时间】：2016-09-02 11:24:41
【问题描述】：

检查这个图像样本我已经完成了Material Design Gridview Image 我在我的应用程序上为网格视图Activity 做了同样的Material Design，我喜欢将onItemClick 添加到新的Activity，

我不知道怎么做，请简要说明解决方法

res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/android_coordinator_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:id="@+id/appbar_layout"
        android:layout_height="@dimen/app_bar_height"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_android_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginStart="@dimen/expanded_toolbar_title_margin_start"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/image_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerInside"
                android:src="@drawable/code"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="0.7" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />

        </android.support.design.widget.CollapsingToolbarLayout>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:id="@+id/nestedscrollview"
        android:layout_height="match_parent"
        android:fillViewport="true"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
            android:id="@+id/linearLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <GridView
                android:id="@+id/grid"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:columnWidth="100dp"
                android:gravity="center"
                android:listSelector="#00000000"
                android:numColumns="auto_fit"
                android:stretchMode="columnWidth" />
        </LinearLayout>
    </android.support.v4.widget.NestedScrollView>

</android.support.design.widget.CoordinatorLayout>

res/layout/gridview_custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/android_gridview_custom_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="10dp">

    <com.andexert.library.RippleView
        android:id="@+id/more"
        rv_centered="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        app:rv_color="#fff"
        app:rv_rippleDuration="200">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/linearLayout"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/gridview_image"
                android:layout_width="80dp"
                android:layout_height="80dp"
                android:src="@mipmap/ic_launcher" />

            <TextView
                android:id="@+id/gridview_text"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/grid_image"
                android:layout_marginTop="10dp"
                android:gravity="center"
                android:text="Grid View Item"
                android:textColor="#444"
                android:textSize="12sp"
                android:textStyle="bold" />
        </LinearLayout>
    </com.andexert.library.RippleView>
</LinearLayout>

src/MainActivity.java

import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.CoordinatorLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.widget.GridView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    Toolbar toolbar;
    CollapsingToolbarLayout collapsingToolbarLayoutAndroid;
    CoordinatorLayout rootLayoutAndroid;
    GridView gridView;
    Context context;
    ArrayList arrayList;

    public static String[] gridViewStrings = {
            "Android",
            "Java",
            "GridView",
            "ListView",
            "Adapter",
            "Custom GridView",
            "Material",
            "XML",
            "Code",

    };
    public static int[] gridViewImages = {
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic,
            R.drawable.android_ic
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        gridView = (GridView) findViewById(R.id.grid);
        gridView.setAdapter(new CustomAndroidGridViewAdapter(this, gridViewStrings, gridViewImages));

        initInstances();
    }

    private void initInstances() {
        rootLayoutAndroid = (CoordinatorLayout) findViewById(R.id.android_coordinator_layout);
        collapsingToolbarLayoutAndroid = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar_android_layout);
        collapsingToolbarLayoutAndroid.setTitle("Material Grid");
    }

}

src/CustomAndroidGridViewAdapter.java

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * Created by HP on 5/11/2016.
 */

public class CustomAndroidGridViewAdapter extends BaseAdapter {
    private Context mContext;
    private final String[] string;
    private final int[] Imageid;

    public CustomAndroidGridViewAdapter(Context c,String[] string,int[] Imageid ) {
        mContext = c;
        this.Imageid = Imageid;
        this.string = string;
    }

    @Override
    public int getCount() {
        return string.length;
    }

    @Override
    public Object getItem(int p) {
        return null;
    }

    @Override
    public long getItemId(int p) {
        return 0;
    }

    @Override
    public View getView(int p, View convertView, ViewGroup parent) {
        View grid;
        LayoutInflater inflater = (LayoutInflater) mContext
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        if (convertView == null) {

            grid = new View(mContext);
            grid = inflater.inflate(R.layout.gridview_custom_layout, null);
            TextView textView = (TextView) grid.findViewById(R.id.gridview_text);
            ImageView imageView = (ImageView)grid.findViewById(R.id.gridview_image);
            textView.setText(string[p]);
            imageView.setImageResource(Imageid[p]);
        } else {
            grid = (View) convertView;
        }

        return grid;
    }
}

当鼠标单击 Gridview 中的图像（图像 1、图像 2 等）时，请给我调用另一个 Activty 的解决方案

【问题讨论】：

可以添加imageView的点击事件
你能在我喜欢添加的地方更改我的代码吗，我是学习 android 应用程序创建的初学者，所以我只是简单地问一下，你能帮我完成我的应用程序吗？ ??
用我的方法替换你的方法解决你的问题
它工作正常，但所有图像都会打开相同的活动，我喜欢为每张图像打开不同的活动，我该怎么做？你能指导我吗，你能把代码发给我吗

标签： java android xml android-layout gridview

【解决方案1】：

用我的方法替换你的方法

@Override
public View getView(int p, View convertView, ViewGroup parent) {
    View grid;
    LayoutInflater inflater = (LayoutInflater) mContext
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {

        grid = new View(mContext);
        grid = inflater.inflate(R.layout.gridview_custom_layout, null);
        TextView textView = (TextView) grid.findViewById(R.id.gridview_text);
        ImageView imageView = (ImageView)grid.findViewById(R.id.gridview_image);
        textView.setText(string[p]);
        imageView.setImageResource(Imageid[p]);

 imageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

     Intent intent = new Intent(context,YourActivity.class);
     context.startActivity(intent);


        }
    });


    } else {
        grid = (View) convertView;
    }

    return grid;
}

【讨论】：

我有 9 个网格图像，我想知道当鼠标单击图像（图像 1、图像 2 等）时调用另一个 Activity ......你能改变我的代码吗？你？？
它工作正常，但所有图像都会打开相同的活动，我喜欢为每张图像打开不同的活动，我该怎么做？你能指导我吗
你得到的位置值在你的 gridViewStrings[] 字符串数组位置相同后，它们传递的位置值是相同的，然后获取图像 ID 并设置为图像图像视图。
为每个activity使用position，您需要在每次图像点击时打开它。
如何为每个activity添加位置？

【解决方案2】：

这是点击每张图片后进入另一个活动的代码。

public class MainActivity extends AppCompatActivity {

Toolbar toolbar;
CollapsingToolbarLayout collapsingToolbarLayoutAndroid;
CoordinatorLayout rootLayoutAndroid;
GridView gridView;
Context context;
ArrayList arrayList;

public static String[] gridViewStrings = {
        "Android",
        "Java",
        "GridView",
        "ListView",
        "Adapter",
        "Custom GridView",
        "Material",
        "XML",
        "Code",

};
public static int[] gridViewImages = {
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic,
        R.drawable.android_ic
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    gridView = (GridView) findViewById(R.id.grid);
    gridView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {          
          if(gridViewStrings[position].equalsIgnoreCase(String.valueOf(1))){
            Intent intent=new Intent(MainActivity.this,SecoundActivity.class);
              intent.putExtra("image",gridViewImages[position]);
              startActivity(intent);
         }
           else if(gridViewStrings[position].equalsIgnoreCase(String.valueOf(2))){
            Intent intent2=new Intent(MainActivity.this,ThirdActvity.class);
              intent2.putExtra("image2",gridViewImages[position]);
              startActivity(intent2);
         }
       //Like this create activites how many images are there in    gridViewImages[]array.you have 9 images so create nine activities..you have to send the url in every activity from one activity to another activity according to your requirement
        }
    });
    gridView.setAdapter(new CustomAndroidGridViewAdapter(this, gridViewStrings, gridViewImages));
    initInstances();
}
private void initInstances() {
    rootLayoutAndroid = (CoordinatorLayout) findViewById(R.id.android_coordinator_layout);
    collapsingToolbarLayoutAndroid = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar_android_layout);
    collapsingToolbarLayoutAndroid.setTitle("Material Grid");
}
}

创建SecoundActivity.class

  public class SecoundActivity extends AppCompactActivity{
    private ImageView image;
     @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       Intent intent=getIntent();
       int position = intent.getExtras().getInt("image");
        setContentView(R.layout.secound_view);
        image=(ImageView) findViewById(R.id.image);
      image.setImageResource(position);
}
}

然后最后创建 secound_view.xml

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_horizontal_margin">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/image"
       />
</LinearLayout>

【讨论】：

如何在我的项目中实现上述代码以及在哪里添加此代码，我有 9 个网格图像，我想知道当鼠标单击图像时调用另一个 Activity（图 1，图 2等）......你能改变我的代码吗？？
是的，我会的
非常感谢！！！，请发送更改代码 :) link 检查此链接我正在按照此网站教程来实现该材料设计，但我不知道如何调用另一个 Actvity当鼠标单击图像（图像 1、图像 2 等）时
当鼠标点击不同活动类别的图片（图片1、图片2等）时如何调用另一个活动，请帮助我，请查看此链接以获取图片以进行验证link
我已经更新了代码，所以请在您的活动中粘贴代码并按照我所描述的答案进行操作。

【解决方案3】：

在 Google 中 10 秒后... Starting Another Activity

Intent intent = new Intent(this, YourActivity.class);
startActivity(intent);

然后点击监听器/事件

gridView.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view,
            int position, long id) {
        Toast.makeText(getApplicationContext(),
                "Item Clicked: " + position, Toast.LENGTH_SHORT).show();

    }
});

【讨论】：

你能解释一下我可以在上面我在这个问题上提到的代码中添加这个代码吗？
设置监听器应该进入 onCreate 或（更好）进入 onViewCreated 方法。启动活动应该在 onItemClick 事件中

【解决方案4】：

在您的 MainActivity onCreate 方法中，为 GridView 添加一个 OnItemClick 侦听器：

gridView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
               // Your Intent goes here

        }
    });

【讨论】：