編輯：關於android開發
開發項目域名想怎麼換就怎麼換，就是這麼任性！
這是一個很有意思的小工具！
這是一個方便開發人員和測試人員的小工具！！
一直在做Android開發，一直總有一個問題存在：做自己公司的apk開發時，線上包和測試包不可兼得~總是在 卸載、安裝、卸載、安裝。。。的循環操作。很是麻煩，而且另外一個不得不正視的問題就是：只要跟服務端人員進行聯調時，就得修改項目中的測試域名，重新打包，也是夠麻煩的。最近報名了公司的一個服務，就不得不使用線上包了，被逼無奈想起了這個小設計。
使用ContentProvider數據共享~
a.ContentProvider在android中的作用是對外共享數據， 也就是說你可以通過ContentProvider把應用中的數據共享給其他應用訪問，其他應用可以通過ContentProvider對你應用中的數據進行添刪改查。
當應用需要通過ContentProvider對外共享數據時，第一步需要繼承ContentProvider並重寫下面方法：
public class PersonContentProvider extends ContentProvider{
public boolean onCreate()
public Uri insert(Uri uri, ContentValues values)
public int delete(Uri uri, String selection, String[] selectionArgs)
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs)
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)
public String getType(Uri uri)
}
b.第二步需要在AndroidManifest.xml使用對該ContentProvider進行配置，為了能讓其他應用找到該ContentProvider ，ContentProvider采用了authorities（主機名/域名）對它進行唯一標識，你可以把ContentProvider看作是一個網 站（想想，網站也是提供數據者），authorities 就是他的域名
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.xc1217.contentprovider">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".activity.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity
android:name=".activity.UrlListActivity"
android:theme="@style/AppTheme.NoActionBar">
</activity>
<provider android:name=".db.MyContentProvider"
android:authorities="com.xc1217.contentprovider.myprovider"
android:exported="true"/>
</application>
</manifest>
/**
* Created by ding on 2016/11/15.
*/
public class DBOpenHelper extends SQLiteOpenHelper {
private static final String DBNAME = "1217provider.db"; //數據庫名稱
private static final int DBVER = 1;//數據庫版本
public DBOpenHelper(Context context) {
super(context, DBNAME, null, DBVER);
}
@Override
public void onCreate(SQLiteDatabase db) {
// id 主鍵id， url 路徑 selected 1 選中，0 未選中
String sql = "CREATE TABLE student (id integer primary key autoincrement, url varchar(500), selected int)";
String sql2 = "CREATE TABLE coach (id integer primary key autoincrement, url varchar(500), selected int)";
db.execSQL(sql);//執行有更改的sql語句
db.execSQL(sql2);
initDb(db);
}
private void initDb(SQLiteDatabase db) {
String sql = "INSERT INTO student VALUES (1,'http://www.1217.com/', 0)";
String sq2 = "INSERT INTO student VALUES (2,'http://www.1217.com/', 1)";
String sq3 = "INSERT INTO student VALUES (3,'http://www.1217.com/', 0)";
String sq4 = "INSERT INTO student VALUES (4,'http://www.1217.com/', 0)";
db.execSQL(sql);
db.execSQL(sq2);
db.execSQL(sq3);
db.execSQL(sq4);
initAddDbCoach(db);
}
private void initAddDbCoach(SQLiteDatabase db) {
String sql = "INSERT INTO coach VALUES (1,'http://www.1217.com/', 0)";
String sq2 = "INSERT INTO coach VALUES (2,'http://www.1217.com/', 1)";
String sq3 = "INSERT INTO coach VALUES (3,'http://www.1217.com/', 0)";
String sq4 = "INSERT INTO coach VALUES (4,'http://www.1217.com/', 0)";
db.execSQL(sql);
db.execSQL(sq2);
db.execSQL(sq3);
db.execSQL(sq4);
}
@Override
public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
db.execSQL("DROP TABLE IF EXISTS student");
db.execSQL("DROP TABLE IF EXISTS coach");
onCreate(db);
}
}
/**
* Created by ding on 2016/11/15.
*/
public class MyContentProvider extends ContentProvider {
private DBOpenHelper dbOpenHelper;
//常量UriMatcher.NO_MATCH表示不匹配任何路徑的返回碼
private static final UriMatcher MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
private static final int STUDENTS = 1;
private static final int STUDENT = 2;
private static final int COACHS = 3;
private static final int COACH = 4;
static {
//如果match()方法匹配content://com.xc1217.contentprovider.myprovider/student路徑，返回匹配碼為1
MATCHER.addURI("com.xc1217.contentprovider.myprovider", "student", STUDENTS);
//如果match()方法匹配content://com.xc1217.contentprovider.myprovider/student/123路徑，返回匹配碼為2
MATCHER.addURI("com.xc1217.contentprovider.myprovider", "student/#", STUDENT);//#號為通配符
MATCHER.addURI("com.xc1217.contentprovider.myprovider", "coach", COACHS);
MATCHER.addURI("com.xc1217.contentprovider.myprovider", "coach/#", COACH);//#號為通配符
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
int count = 0;
long id = 0;
String where = "";
switch (MATCHER.match(uri)) {
case STUDENTS:
count = db.delete("student", selection, selectionArgs);
return count;
case STUDENT:
//ContentUris類用於獲取Uri路徑後面的ID部分
id = ContentUris.parseId(uri);
where = "id = " + id;
if (selection != null && !"".equals(selection)) {
where = selection + " and " + where;
}
count = db.delete("student", where, selectionArgs);
return count;
case COACHS:
count = db.delete("coach", selection, selectionArgs);
return count;
case COACH:
//ContentUris類用於獲取Uri路徑後面的ID部分
id = ContentUris.parseId(uri);
where = "id = " + id;
if (selection != null && !"".equals(selection)) {
where = selection + " and " + where;
}
count = db.delete("coach", where, selectionArgs);
return count;
default:
throw new IllegalArgumentException("Unkwon Uri:" + uri.toString());
}
}
/**
* 該方法用於返回當前Url所代表數據的MIME類型。
* 如果操作的數據屬於集合類型，那麼MIME類型字符串應該以vnd.android.cursor.dir/開頭
* 如果要操作的數據屬於非集合類型數據，那麼MIME類型字符串應該以vnd.android.cursor.item/開頭
*/
@Override
public String getType(Uri uri) {
switch (MATCHER.match(uri)) {
case STUDENTS:
return "vnd.android.cursor.dir/student";
case STUDENT:
return "vnd.android.cursor.item/student";
case COACHS:
return "vnd.android.cursor.dir/coach";
case COACH:
return "vnd.android.cursor.item/coach";
default:
throw new IllegalArgumentException("Unkwon Uri:" + uri.toString());
}
}
@Override
public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
long rowid = 0;
Uri insertUri = null;//得到代表新增記錄的Uri
switch (MATCHER.match(uri)) {
case STUDENTS:
rowid = db.insert("student", "url", values);
insertUri = ContentUris.withAppendedId(uri, rowid);//得到代表新增記錄的Uri
this.getContext().getContentResolver().notifyChange(uri, null);
return insertUri;
case COACHS:
rowid = db.insert("coach", "url", values);
insertUri = ContentUris.withAppendedId(uri, rowid);//得到代表新增記錄的Uri
this.getContext().getContentResolver().notifyChange(uri, null);
return insertUri;
default:
throw new IllegalArgumentException("Unkwon Uri:" + uri.toString());
}
}
@Override
public boolean onCreate() {
this.dbOpenHelper = new DBOpenHelper(this.getContext());
return false;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
long id = 0;
String where = null;
switch (MATCHER.match(uri)) {
case STUDENTS:
return db.query("student", projection, selection, selectionArgs, null, null, sortOrder);
case STUDENT:
id = ContentUris.parseId(uri);
where = "id = " + id;
if (selection != null && !"".equals(selection)) {
where = selection + " and " + where;
}
return db.query("student", projection, where, selectionArgs, null, null, sortOrder);
case COACHS:
return db.query("coach", projection, selection, selectionArgs, null, null, sortOrder);
case COACH:
id = ContentUris.parseId(uri);
where = "id = " + id;
if (selection != null && !"".equals(selection)) {
where = selection + " and " + where;
}
return db.query("coach", projection, where, selectionArgs, null, null, sortOrder);
default:
throw new IllegalArgumentException("Unkwon Uri:" + uri.toString());
}
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
int count = 0;
long id = 0;
String where = null;
switch (MATCHER.match(uri)) {
case STUDENTS:
count = db.update("student", values, selection, selectionArgs);
return count;
case STUDENT:
id = ContentUris.parseId(uri);
where = "id = " + id;
if (selection != null && !"".equals(selection)) {
where = selection + " and " + where;
}
count = db.update("student", values, where, selectionArgs);
return count;
case COACHS:
count = db.update("coach", values, selection, selectionArgs);
return count;
case COACH:
id = ContentUris.parseId(uri);
where = "id = " + id;
if (selection != null && !"".equals(selection)) {
where = selection + " and " + where;
}
count = db.update("coach", values, where, selectionArgs);
return count;
default:
throw new IllegalArgumentException("Unkwon Uri:" + uri.toString());
}
}
}
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
findViewById(R.id.lay_student).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, UrlListActivity.class);
intent.putExtra("table", "student");
startActivity(intent);
}
});
findViewById(R.id.lay_coach).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, UrlListActivity.class);
intent.putExtra("table", "coach");
startActivity(intent);
}
});
}
}
public class UrlListActivity extends AppCompatActivity {
private static final String TAG = "UrlListActivity";
String uriString = "content://com.xc1217.contentprovider.myprovider/";
private String table = "";
private List<UrlBean> mList = new ArrayList<UrlBean>();
private ListView listView;
private int position;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_url_list);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Intent intent = getIntent();
if (intent != null) {
table = intent.getStringExtra("table");
if (TextUtils.isEmpty(table))
return;
setTitle(table);
uriString = uriString + table;
}
initUI();
getUrlList();
}
private void initUI() {
listView = (ListView) findViewById(R.id.list_url);
findViewById(R.id.btn_add).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
showAddPop();
} catch (Throwable throwable) {
throwable.printStackTrace();
}
}
});
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
position = i;
showClickPop();
}
});
}
private void showAddPop() {
final EditText editText = new EditText(this);
editText.setText("http://www.1217.com/");
editText.setHint("http://www.1217.com/");
final AlertDialog alertDialog = new AlertDialog.Builder(this).
setTitle("添加")
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
})
.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String url = editText.getText().toString();
insertUrl(url);
}
}).setView(editText).create();
alertDialog.show();
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View
.OnClickListener() {
@Override
public void onClick(View v) {
String url = editText.getText().toString();
if (TextUtils.isEmpty(url)) {
Toast.makeText(UrlListActivity.this, "不能為空", Toast.LENGTH_SHORT).show();
return;
}
insertUrl(url);
alertDialog.dismiss();
getUrlList();
}
});
}
private void showClickPop() {
final String[] arrayFruit = new String[]{"選擇", "刪除"};
Dialog alertDialog = new AlertDialog.Builder(this).
setTitle("編輯")
.setItems(arrayFruit, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
for (int i = 0; i < mList.size(); i++) {
UrlBean urlBean = mList.get(i);
urlBean.selected = (position == i ? 1 : 0);
update(urlBean);
}
UrlAdapter urlAdapter = new UrlAdapter(UrlListActivity.this, mList);
listView.setAdapter(urlAdapter);
break;
case 1:
int id = mList.get(position).id;
deleteById(id);
getUrlList();
break;
default:
break;
}
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).
create();
alertDialog.show();
}
//往內容提供者添加數據
public void insertUrl(String url) {
try {
ContentResolver contentResolver = this.getContentResolver();
Uri insertUri = Uri.parse(uriString);
ContentValues values = new ContentValues();
values.put("url", url);
values.put("selected", 0);
Uri uri = contentResolver.insert(insertUri, values);
Log.i(TAG, uri.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
//更新內容提供者中的數據
public void update(UrlBean urlBean) {
try {
ContentResolver contentResolver = this.getContentResolver();
Uri updateUri = Uri.parse(uriString + "/" + urlBean.id);
ContentValues values = new ContentValues();
values.put("url", urlBean.url);
values.put("selected", urlBean.selected);
contentResolver.update(updateUri, values, null, null);
} catch (Exception e) {
e.printStackTrace();
}
}
//從內容提供者中刪除數據
public void deleteById(Integer id) {
try {
ContentResolver contentResolver = this.getContentResolver();
Uri deleteUri = Uri.parse(uriString + "/" + id);
contentResolver.delete(deleteUri, null, null);
} catch (Exception e) {
e.printStackTrace();
}
}
//獲取內容提供者中的數據
public void getUrlList() {
try {
ContentResolver contentResolver = this.getContentResolver();
Uri selectUri = Uri.parse(uriString);
Cursor cursor = contentResolver.query(selectUri, null, null, null, null);
if (cursor == null)
return;
mList.clear();
while (cursor.moveToNext()) {
int id = cursor.getInt(cursor.getColumnIndex("id"));
String url = cursor.getString(cursor.getColumnIndex("url"));
int selected = cursor.getInt(cursor.getColumnIndex("selected"));
Log.i(TAG, "id=" + id + ",url=" + url + ",selected=" + selected);
UrlBean urlBean = new UrlBean(id, url, selected);
mList.add(urlBean);
}
UrlAdapter urlAdapter = new UrlAdapter(this, mList);
listView.setAdapter(urlAdapter);
} catch (Exception e) {
e.printStackTrace();
}
}
}
public class UrlAdapter extends BaseAdapter {
private Context mContext;
private List<UrlBean> mList;
public UrlAdapter(Context c, List<UrlBean> l) {
// TODO Auto-generated constructor stub
mContext = c;
mList = l;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mList.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return mList.get(arg0);
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public View getView(final int i, View view, ViewGroup arg2) {
ViewHoldel holdel;
if (view == null) {
holdel = new ViewHoldel();
view = LayoutInflater.from(mContext).inflate(R.layout.url_item,
null);
holdel.tvContent = (TextView) view.findViewById(R.id.tv_content);
holdel.imageView = (ImageView) view.findViewById(R.id.imv_right);
view.setTag(holdel);
} else {
holdel = (ViewHoldel) view.getTag();
}
holdel.tvContent.setText(mList.get(i).url);
if (mList.get(i).selected == 1) {
holdel.imageView.setVisibility(View.VISIBLE);
} else {
holdel.imageView.setVisibility(View.GONE);
}
return view;
}
class ViewHoldel {
TextView tvContent;
ImageView imageView;
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="@dimen/activity_horizontal_margin"
android:orientation="horizontal">
<TextView
android:id="@+id/tv_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text=",,"
android:textSize="15sp"/>
<ImageView
android:id="@+id/imv_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/icon_true_big"/>
</LinearLayout>
重點來了！！！
開發人員接入代碼，替換域名：
代碼加入到 Application 初始化方法中；根據需要修改下代碼即可。
private void changeServerHostFromProvider() {
Uri uri = Uri.parse("content://com.xc1217.contentprovider.myprovider/student");
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
String url = cursor.getString(cursor.getColumnIndex("url"));
int selected = cursor.getInt(cursor.getColumnIndex("selected"));// 1 選中，否則未選中
if (selected == 1 && !TextUtils.isEmpty(url)) {
Urls.BASE_URL_TEST = url;
Urls.BASE_URL_ONLINE = url;
return;
}
}
cursor.close();
}
}
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