为什么';Android SDK教程中的代码不是现成的吗?
我是不是遗漏了什么 我完全按照本页上的说明(以及其他一些教程)进行操作,但它们似乎总是缺少一些关键信息,因为它们不是开箱即用的 我添加了一堆看起来好像丢失了的包,但现在我被卡住了 描述资源路径位置类型 转换为Dalvik格式失败,错误1 HelloGrid未知Android打包问题为什么';Android SDK教程中的代码不是现成的吗?,android,sdk,Android,Sdk,我是不是遗漏了什么 我完全按照本页上的说明(以及其他一些教程)进行操作,但它们似乎总是缺少一些关键信息,因为它们不是开箱即用的 我添加了一堆看起来好像丢失了的包,但现在我被卡住了 描述资源路径位置类型 转换为Dalvik格式失败,错误1 HelloGrid未知Android打包问题 package com.example.HelloGrid; import android.app.Activity; import android.os.Bundle; import android.view.
package com.example.HelloGrid;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import com.example.ImageAdapter.ImageAdapter;
public class HelloGrid extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(HelloGrid.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
}
package com.example.ImageAdapter;
import android.R;
import android.R.drawable;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7
};
}
每一个可绘制的示例参考都有一大堆这些
描述资源路径位置类型
R.drawable.sample_0无法解决ImageAdapter.java/HelloGrid/src/com/example/ImageAdapter line 51 java问题
package com.example.HelloGrid;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import com.example.ImageAdapter.ImageAdapter;
public class HelloGrid extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(HelloGrid.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
}
package com.example.ImageAdapter;
import android.R;
import android.R.drawable;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7
};
}
package com.example.HelloGrid;
导入android.app.Activity;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.GridView;
导入android.widget.Toast;
导入android.widget.AdapterView.OnItemClickListener;
导入com.example.ImageAdapter.ImageAdapter;
公共类HelloGrid扩展了活动{
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView GridView=(GridView)findViewById(R.id.GridView);
setAdapter(新的ImageAdapter(this));
setOnItemClickListener(新的OnItemClickListener(){
public void onItemClick(AdapterView父视图、视图v、整型位置、长id){
Toast.makeText(HelloGrid.this,“+位置,Toast.LENGTH_SHORT.show();
}
});
}
}
包com.example.ImageAdapter;
导入android.R;
导入android.R.drawable;
导入android.content.Context;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.BaseAdapter;
导入android.widget.GridView;
导入android.widget.ImageView;
公共类ImageAdapter扩展了BaseAdapter{
私有上下文;
公共图像适配器(上下文c){
mContext=c;
}
public int getCount(){
返回mThumbIds.length;
}
公共对象getItem(int位置){
返回null;
}
公共长getItemId(int位置){
返回0;
}
//为适配器引用的每个项目创建新的ImageView
公共视图getView(int位置、视图转换视图、视图组父视图){
图像视图图像视图;
如果(convertView==null){//如果它没有被回收,初始化一些属性
imageView=新的imageView(mContext);
setLayoutParams(新的GridView.LayoutParams(85,85));
imageView.setScaleType(imageView.ScaleType.CENTER\U裁剪);
设置填充(8,8,8,8);
}否则{
imageView=(imageView)convertView;
}
setImageResource(mThumbIds[position]);
返回图像视图;
}
//参考我们的图像
私有整数[]mThumbIds={
R.drawable.sample_2,R.drawable.sample_3,
R.drawable.sample_4,R.drawable.sample_5,
R.drawable.sample_6,R.drawable.sample_7,
R.drawable.sample_0,R.drawable.sample_1,
R.drawable.sample_2,R.drawable.sample_3,
R.drawable.sample_4,R.drawable.sample_5,
R.drawable.sample_6,R.drawable.sample_7,
R.drawable.sample_0,R.drawable.sample_1,
R.drawable.sample_2,R.drawable.sample_3,
R.drawable.sample_4,R.drawable.sample_5,
R.drawable.sample_6,R.drawable.sample_7
};
}
如您所见,我已将所有图像加载到/drawable目录中
教程似乎缺少一些软件包信息,但如果您使用的是eclipse,它应该可以为您处理大部分信息 说明资源路径位置类型R.drawable.sample_0无法解决ImageAdapter.java/HelloGrid/src/com/example/ImageAdapter line 51 java问题
您缺少可提取的资源。删除导入android.R中的步骤2介绍了这一点 这混淆了日食的R 这就是它无法定位图像的原因 此外,您可以简单地将其放置在res中预先创建的可绘制目录中(例如,可绘制hdpi等)。我有一个解决方案:
package com.gridview.test;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.GridView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;
import android.widget.BaseAdapter;
import android.content.Context;
import android.view.ViewGroup;
import android.widget.ImageView;
public class HelloGridView extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(HelloGridView.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7
};
}
}
package com.gridview.test;
导入android.app.Activity;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.GridView;
导入android.widget.AdapterView;
导入android.widget.AdapterView.OnItemClickListener;
导入android.widget.Toast;
导入android.widget.BaseAdapter;
导入android.content.Context;
导入android.view.ViewGroup;
导入android.widget.ImageView;
公共类HelloGridView扩展活动{
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView GridView=(GridView)findViewById(R.id.GridView);
setAdapter(新的ImageAdapter(this));
setOnItemClickListener(新的OnItemClickListener(){
public void onItemClick(AdapterView父视图、视图v、整型位置、长id){
Toast.makeText(HelloGridView.this,“+位置,Toast.LENGTH_SHORT).show();
}
});
}
公共类ImageAdapter扩展了BaseAdapter{
私有上下文;
公共图像适配器(上下文c){
mContext=c;
}
public int getCount(){
返回mThumbIds.length;
}
公共对象getItem(int位置){
返回null;
}
公共长getItemId(int位置){
返回0;
}
//为每个i创建一个新的ImageView
Toast.makeText(HelloGridViewActivity.this, "" + position, Toast.LENGTH_SHORT).show();