這是筆者在之前的 Android 開發中遇到的一些常用的模組化寫法，用的還是比較多的，在這裡記錄一下！其實這些程式碼不需要去記，實在不記得了查一下就 OK 了！
獲取app的版本號
private int getVersionCode() {
PackageManager packageManager = getPackageManager();
try {
PackageInfo packageInfo = packageManager.getPackageInfo(getPackageName(), 0);
int versionCode = packageInfo.versionCode;
return versionCode;
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return -1;
}
複製程式碼獲取app的版本名稱
private String getVersionName() {
PackageManager packageManager = getPackageManager();
try {
PackageInfo packageInfo = packageManager.getPackageInfo(getPackageName(), 0);
String versionName = packageInfo.versionName;
return versionName;
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "";
}
複製程式碼判斷sd卡是否掛載
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
//如果有，則目標路徑為....
String target = Environment.getExternalStorageDirectory()+"update.apk";
}else {
Toast.makeText(SplashActivity.this, "sd卡不存在,親!", Toast.LENGTH_SHORT).show();
}
複製程式碼跳轉到系統下載介面
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setDataAndType(Uri.fromFile(arg0.result),"application/vnd.android.package-archive");
startActivity(intent);
複製程式碼判斷出當前是否有網路
//首先通過 getSystemService()方法得到了 ConnectivityManager 的例項， 這是一個系統服務類, 專門用於管理網路連線
ConnectivityManager connectionManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectionManager.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isAvailable()) {
Toast.makeText(context, "network is available", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "network is unavailable", Toast.LENGTH_SHORT).show();
}
複製程式碼簡訊接收
// 如果是接收到簡訊
if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) {
// 取消廣播（這行程式碼將會讓系統收不到簡訊）
abortBroadcast(); //
StringBuilder sb = new StringBuilder();
// 接收由SMS傳過來的資料
Bundle bundle = intent.getExtras();
// 判斷是否有資料
if (bundle != null) {
// 通過pdus可以獲得接收到的所有簡訊訊息
Object[] pdus = (Object[]) bundle.get("pdus");
// 構建簡訊物件array,並依據收到的物件長度來建立array的大小
SmsMessage[] messages = new SmsMessage[pdus.length];
for (int i = 0; i < pdus.length; i++) {
messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
}
// 將傳送來的簡訊合併自定義資訊於StringBuilder當中
for (SmsMessage message : messages) {
sb.append("簡訊來源:");
// 獲得接收簡訊的電話號碼
sb.append(message.getDisplayOriginatingAddress());
sb.append("\n------簡訊內容------\n");
// 獲得簡訊的內容
sb.append(message.getDisplayMessageBody());
}
}
Toast.makeText(context, sb.toString(), Toast.LENGTH_LONG).show();
}
複製程式碼清單檔案
<receiver android:name="com.lhg.smsintercept.SmsReceiver" >
<intent-filter android:priority="100">
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
複製程式碼監聽SD卡
//判斷收到的到底是什麼廣播
String action = intent.getAction();
if(Intent.ACTION_MEDIA_MOUNTED.equals(action)){
Toast.makeText(context, "SD卡可用", 0).show();
}else if(Intent.ACTION_MEDIA_UNMOUNTED.equals(action)){
Toast.makeText(context, "sd不可用", 0).show();
}else if(Intent.ACTION_MEDIA_REMOVED.equals(action)){
Toast.makeText(context, "sd卡已拔出 ", 0).show();
}
複製程式碼清單檔案
<receiver android:name="com.lhg.sdlistener.SDStatusListener">
<intent-filter >
<action android:name="android.intent.action.MEDIA_MOUNTED"/>
<action android:name="android.intent.action.MEDIA_REMOVED"/>
<action android:name="android.intent.action.MEDIA_UNMOUNTED"/>
<data android:scheme="file"/>
</intent-filter>
</receiver>
複製程式碼獲取電池狀態
@Override
public void onReceive(Context context, Intent intent) {
// 獲取當前電池狀態資訊
String action = intent.getAction();
if (Intent.ACTION_BATTERY_LOW.equals(action)) {
tv_battery.setText("電池電量不足,快他媽充電去...");
}else if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
// (1)取得當前電量
Bundle bundle = intent.getExtras();
int currentLevel = bundle.getInt("level");
// (2)取得總電量
int total = bundle.getInt("scale");
// (3)顯示
double persent = currentLevel * 100 / total;
tv_battery.setText("當前電量為:" + persent + "%");
}else if (Intent.ACTION_BATTERY_OKAY.equals(action)) {
tv_battery.setText("電池充好了,快他媽起來嗨...");
}
}
複製程式碼##監控應用程式的狀態 @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub String action = intent.getAction(); Uri uri = intent.getData(); if(Intent.ACTION_PACKAGE_ADDED.equals(action)){ Toast.makeText(context,uri.toString()+"被安裝了", 0).show(); }else if(Intent.ACTION_PACKAGE_REPLACED.equals(action)){ Toast.makeText(context,uri.toString()+"被升級了", 0).show(); }else if(Intent.ACTION_PACKAGE_REMOVED.equals(action)){ Toast.makeText(context,uri.toString()+"被解除安裝了", 0).show(); } } 清單檔案
<receiver android:name="com.lhg.packagelistener.AppStateReceiver">
<intent-filter >
<action android:name="android.intent.action.PACKAGE_ADDED"/>
<action android:name="android.intent.action.PACKAGE_REPLACED"/>
<action android:name="android.intent.action.PACKAGE_REMOVED"/>
<data android:scheme="package"/>
</intent-filter>
</receiver>
複製程式碼ListView 自定義 Adapter 寫法
class FruitAdapter extends BaseAdapter {
private List<String> mData;
private LayoutInflater mInflater;
private Context mContext;
public FruitAdapater(Context context, List<String> mData){
this.mData = mData;
mContext = context;
//以下方式二選一
mInflater = LayoutInflater.from(context);
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if(convertView == null){
viewHolder = new ViewHolder();
convertView =mInflater.inflate(ThirdActivity.this, R.layout.fruit_item, null);
viewHolder.fruitImageId = (ImageView) convertView.findViewById(R.id.iv_photo);
viewHolder.fruitName = (TextView) convertView.findViewById(R.id.tv_name);
convertView.setTag(viewHolder);
}else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.fruitImageId.setImageResource(mData.get(position).getImgId());
viewHolder.fruitName.setText(mData.get(position).getName());
return convertView;
}
class ViewHolder{
ImageView fruitImageId;
TextView fruitName;
}
}
複製程式碼在對話方塊中載入佈局(方式一)
AlertDialog.Builder builder = new Builder(this);
final AlertDialog dialog = builder.create();
// 裝載佈局
View dialog_view = getLayoutInflater().inflate(R.layout.add_black_number, null);
// View dialog_view =LayoutInflater.from(this).inflate(R.layout.add_black_number, null);
// View dialog_view = View.inflate(this, R.layout.add_black_number,null);
//初始化控制元件
Button bt_ok = (Button) dialog_view.findViewById(R.id.bt_ok);
Button bt_cancle = (Button) dialog_view.findViewById(R.id.bt_cancel);
//點選確定按鈕
bt_ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//do something....
dialog.dismiss();
}
});
// 單擊取消按鈕
bt_cancle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
// 讓佈局顯示在對話方塊中
dialog.setView(dialog_view, 0, 0, 0, 0);
dialog.show();
複製程式碼在對話方塊中載入佈局(方式二)
final AlertDialog dialog = new AlertDialog.Builder(this).create();
dialog.show();//不能放在最後寫，否則會報錯
Window window = dialog.getWindow();//拿到對話方塊所在的視窗物件
window.setGravity(Gravity.BOTTOM);//對齊底部
window.setContentView(R.layout.dialog);//給對話方塊設定佈局
Button cancelBtn = (Button) window.findViewById(R.id.camera_cancel);//或用dialog.findViewById
cancelBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog.cancel();
}
});
=============================使對話方塊與螢幕寬度持平=============================================
final Dialog dialog = new Dialog(this,R.style.BottomDialog);
dialog.show();
dialog.setContentView(R.layout.dialog);
dialog.setCanceledOnTouchOutside(true);// 外部點選取消
Button btnCancel = (Button) dialog.findViewById(R.id.btn_cancel);
Window window = dialog.getWindow();
window.setWindowAnimations(R.style.AnimDialog);//對話方塊進出螢幕的動畫
//使對話方塊寬度與手機寬度持平
WindowManager.LayoutParams params = window.getAttributes();
params.gravity = Gravity.BOTTOM;
params.width = WindowManager.LayoutParams.MATCH_PARENT;
//params.height = getWindowManager().getDefaultDisplay().getHeight()*3/5;
window.setAttributes(params);
===============================AnimDialog樣式===============================================
<style name="AnimDialog" parent="@android:style/Animation">
<item name="android:windowEnterAnimation">@anim/push_bottom_in</item>
<item name="android:windowExitAnimation">@anim/push_bottom_out</item>
</style>
===============================BottomDialog樣式=============================================
<style name="BottomDialog" parent="@style/AppTheme">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:windowIsFloating">true</item>
<item name="android:backgroundDimEnabled">true</item>
</style>
===============================push_bottom_in=============================================
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="500"
android:fromYDelta="100%p"
android:toYDelta="0"
/>
</set>
===============================push_bottom_out=============================================
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="500"
android:fromYDelta="0"
android:toYDelta="100%p" />
</set>
==============================dialog.xml====================================================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/dialog"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#D3D3D3"
android:orientation="vertical"
android:padding="15dp" >
<Button
android:id="@+id/camera_camera"
android:layout_width="320dp"
android:layout_height="45dp"
android:layout_gravity="center"
android:text="直接拍照上傳"
android:textSize="18sp" />
<Button
android:id="@+id/camera_phone"
android:layout_width="320dp"
android:layout_height="45dp"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:text="從手機相片選擇"
android:textSize="18sp" />
<Button
android:id="@+id/camera_cancel"
android:layout_width="320dp"
android:layout_height="45dp"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:text="取消"
android:textColor="#ff77ff"
android:textSize="18sp" />
</LinearLayout>
複製程式碼自定義控制元件樣式
<style name="TitleSytle">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">50dp</item>
<item name="android:background">#8866ff00</item>
<item name="android:gravity">center</item>
<item name="android:textColor">@color/black</item>
<item name="android:textSize">22sp</item>
</style>
複製程式碼Android 進行單元測試步驟
-
在清單檔案中說明，與 Application 同級
<instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="com.excel.androidtestcase" > </instrumentation> 複製程式碼 -
增加測試庫，與 activity 同級
<uses-library android:name="android.test.runner"/> 複製程式碼 -
繼承自 ActivityTestCase
public class MainActivity extends ActivityTestCase { public void test1() { int result = Utils.add(2, 5); // 斷言：用來檢測實際值與期望值是否一致 assertEquals(7, result); } public void test2(){ Utils.divide(2, 4); } } 複製程式碼 -
Utils 類說明
public class Utils { public static int add(int i, int j){ return i + j; } public static void divide(int i, int j){ int result = i / j; } } 複製程式碼
待續。。。