查找图片

结果效果图

代码如下：

<LinearLayout 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"    android:orientation="vertical"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <ImageView        android:id="@+id/ivImage"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:layout_weight="1" />    <EditText        android:id="@+id/etImageUrl"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:ems="10"        android:hint="请输入图片的地址" />    <Button        android:id="@+id/btnView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:background="@drawable/button_bg"        android:onClick="viewImage"        android:text="浏览" /></LinearLayout>

public class Dictionary extends Activity implements OnClickListener,TextWatcher {private DBHelper dbHelper; // 用户输入文本框private AutoCompleteTextView word; // 定义数据库的名字private SQLiteDatabase database;private Button searchWord; // 搜索按钮private TextView showResult; // 用户显示查询结果@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);dbHelper = new DBHelper(getBaseContext());// 打开数据库database = dbHelper.openDatabase();init();searchWord.setOnClickListener(this); // 绑定监听器word.addTextChangedListener(this); // 绑定文字改变监听器}public void init() {searchWord = (Button) findViewById(R.id.btnSearch);word = (AutoCompleteTextView) findViewById(R.id.etWord);showResult = (TextView) findViewById(R.id.tvSearchResult);}public void afterTextChanged(Editable s) {Cursor cursor = database.rawQuery("select english as _id from t_words where english like ?",new String[] { s.toString() + "%" });// 新建新的AdapterDictionaryAdapter dictionaryAdapter = new DictionaryAdapter(this,cursor, true);// 绑定适配器word.setAdapter(dictionaryAdapter);}public void beforeTextChanged(CharSequence s, int start, int count,int after) {}public void onTextChanged(CharSequence s, int start, int before, int count) {}public void onClick(View view) {// 查询指定的单词String sql = "select chinese from t_words where english=?";Cursor cursor = database.rawQuery(sql, new String[] { word.getText().toString() });String result = "查无该词"; // 如果查找单词，显示其中文的意思if (cursor.getCount() > 0) { cursor.moveToFirst(); // 须使用moveToFirst方法将记录指针移动到第1条记录的位置result = cursor.getString(cursor.getColumnIndex("chinese")).replace("&", "&");}showResult.setText(word.getText() + "\n" + result.toString());// 将结果显示到TextView中}

输入网址即可得到图片

public class Dictionary extends Activity implements OnClickListener,TextWatcher {private DBHelper dbHelper; // 用户输入文本框private AutoCompleteTextView word; // 定义数据库的名字private SQLiteDatabase database;private Button searchWord; // 搜索按钮private TextView showResult; // 用户显示查询结果@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);dbHelper = new DBHelper(getBaseContext());// 打开数据库database = dbHelper.openDatabase();init();searchWord.setOnClickListener(this); // 绑定监听器word.addTextChangedListener(this); // 绑定文字改变监听器}public void init() {searchWord = (Button) findViewById(R.id.btnSearch);word = (AutoCompleteTextView) findViewById(R.id.etWord);showResult = (TextView) findViewById(R.id.tvSearchResult);}public void afterTextChanged(Editable s) {Cursor cursor = database.rawQuery("select english as _id from t_words where english like ?",new String[] { s.toString() + "%" });// 新建新的AdapterDictionaryAdapter dictionaryAdapter = new DictionaryAdapter(this,cursor, true);// 绑定适配器word.setAdapter(dictionaryAdapter);}public void beforeTextChanged(CharSequence s, int start, int count,int after) {}public void onTextChanged(CharSequence s, int start, int before, int count) {}public void onClick(View view) {// 查询指定的单词String sql = "select chinese from t_words where english=?";Cursor cursor = database.rawQuery(sql, new String[] { word.getText().toString() });String result = "查无该词"; // 如果查找单词，显示其中文的意思if (cursor.getCount() > 0) { cursor.moveToFirst(); // 须使用moveToFirst方法将记录指针移动到第1条记录的位置result = cursor.getString(cursor.getColumnIndex("chinese")).replace("&", "&");}showResult.setText(word.getText() + "\n" + result.toString());// 将结果显示到TextView中}