常用安卓开发技巧汇总
2015-11-27 16:31
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经常用的一些小技巧都会记录在这边
API权限错误提示解决方法:
报这么一个错误:Call requires API level 11 (current min is 8): android.animation.ObjectAnimator#ofFloat
主要原因是 AndroidManifest.xml中的API权限等级不够:
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
修改成:
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="17" />
获取手机号码:
//创建电话管理
TelephonyManager tm = (TelephonyManager)
//与手机建立连接
activity.getSystemService(Context.TELEPHONY_SERVICE);
//获取手机号码
String phoneId = tm.getLine1Number();
//记得在manifest file中添加
<uses-permission
android:name="android.permission.READ_PHONE_STATE" />
//程序在模拟器上无法实现,必须连接手机
格式化string.xml 中的字符串
// in strings.xml..<string name="my_text">Thanks for visiting %s. You age is %d!</string>
// and in the java code:
String.format(getString(R.string.my_text), "oschina", 33);
android设置全屏的方法
requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
检查当前网络是否连上
ConnectivityManager con=(ConnectivityManager)getSystemService(Activity.CONNECTIVITY_SERVICE);boolean wifi=con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
boolean internet=con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();
在AndroidManifest.xml 增加权限:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
检测某个Intent是否有效
public static boolean isIntentAvailable(Context context, String action) {final PackageManager packageManager = context.getPackageManager();
final Intent intent = new Intent(action);
List<ResolveInfo> list =
packageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
android 拨打电话
try {Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:+110"));
startActivity(intent);
} catch (Exception e) {
Log.e("SampleApp", "Failed to invoke call", e);
}
android中发送Email
Intent i = new Intent(Intent.ACTION_SEND);//i.setType("text/plain"); //模拟器请使用这行
i.setType("message/rfc822") ; // 真机上使用这行
i.putExtra(Intent.EXTRA_EMAIL, new String[]{"test@gmail.com","test@163.com});
i.putExtra(Intent.EXTRA_SUBJECT,"subject goes here");
i.putExtra(Intent.EXTRA_TEXT,"body goes here");
startActivity(Intent.createChooser(i, "Select email application."));
android中打开浏览器
Intent viewIntent = newIntent("android.intent.action.VIEW",Uri.parse("http://vaiyanzi.cnblogs.com"));
startActivity(viewIntent);
android 获取设备唯一标识码
String android_id = Secure.getString(getContext().getContentResolver(), Secure.ANDROID_ID);android中获取IP地址
public String getLocalIpAddress() {try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();
enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException ex) {
Log.e(LOG_TAG, ex.toString());
}
return null;
}
android获取存储卡路径以及使用情况
/** 获取存储卡路径 */File sdcardDir=Environment.getExternalStorageDirectory();
/** StatFs 看文件系统空间使用情况 */
StatFs statFs=new StatFs(sdcardDir.getPath());
/** Block 的 size*/
Long blockSize=statFs.getBlockSize();
/** 总 Block 数量 */
Long totalBlocks=statFs.getBlockCount();
/** 已使用的 Block 数量 */
Long availableBlocks=statFs.getAvailableBlocks();
android中添加新的联系人
private Uri insertContact(Context context, String name, String phone) {ContentValues values = new ContentValues();
values.put(People.NAME, name);
Uri uri = getContentResolver().insert(People.CONTENT_URI, values);
Uri numberUri = Uri.withAppendedPath(uri, People.Phones.CONTENT_DIRECTORY);
values.clear();
values.put(Contacts.Phones.TYPE, People.Phones.TYPE_MOBILE);
values.put(People.NUMBER, phone);
getContentResolver().insert(numberUri, values);
return uri;
}
查看电池使用情况
Intent intentBatteryUsage = new Intent(Intent.ACTION_POWER_USAGE_SUMMARY);startActivity(intentBatteryUsage);
获取进程号
ActivityManager mActivityManager = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);List<ActivityManager.RunningAppProcessInfo> mRunningProcess = mActivityManager.getRunningAppProcesses();
int i = 1;
for (ActivityManager.RunningAppProcessInfo amProcess : mRunningProcess)
{
Log.e("homer Application", (i++) + " PID = " + amProcess.pid + ";
processName = " + amProcess.processName);
}
android 之setOutsideTouchable
在使用弹出框希望点击弹出框外的任意处让弹出框消失,先把设置弹出框的setOutsideTouchable为true,然后重写onTouch。
win = new PopupWindow(contentView, LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT);
win.setOutsideTouchable(true);
win.setFocusable(true);
// 点击弹出窗口区域之外的任意区域,则该窗口关闭
win.setTouchInterceptor(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
win.dismiss();
return true;
}
return false;
}
});
android 获取资源文件
Resources myResources = getResources();String str = myResources.getString(R.string.app_name);
myResources.getDrawable(R.drawable.jhs_button1_h);
打开播放器
am start -a android.intent.action.VIEW -t video/* -d 'url地址'px转pd
private int getPixels(int dipValue) {Resources r = getResources();
int px = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dipValue, r.getDisplayMetrics());
return px;
}
动态修改ImageView的长宽
ImageView imageView = (ImageView) findViewById(R.id.videoImage1);LayoutParams para = imageView.getLayoutParams();
para.height = getPixels(180);
para.width = getPixels(120);
imageView.setLayoutParams(para);
动态设置padding
ImageView imageView = new ImageView(this);imageView.setPadding(5,5,5,5)
动态设置margin
//设置marginLinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(0, getPixels(13), 0, 0);
显示网络图片
public Bitmap returnBitMap(String url){URL myFileUrl = null;
Bitmap bitmap = null;
try {
myFileUrl = new URL(url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl
.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bitmap = BitmapFactory.decodeStream(is);
is.close();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
:
ImageView imageView = (ImageView) findViewById(R.id.imageView);
String url = "http://www.baidu.com/img/bdlogo.gif";
imageView.setImageBitmap(returnBitMap(url));
删除APK
Uri uri =Uri.fromParts("package", strPackageName, null);Intent it = newIntent(Intent.ACTION_DELETE, uri);
startActivity(it);
安装APK
Uri installUri = Uri.fromParts("package","xxx", null);returnIt = newIntent(Intent.ACTION_PACKAGE_ADDED, installUri);
px和dp互转
public static int dip2px(Context context, float dipValue){final float scale = context.getResources().getDisplayMetrics().density;
return (int)(dipValue * scale + 0.5f);
}
public static int px2dip(Context context, float pxValue){
final float scale = context.getResources().getDisplayMetrics().density;
return (int)(pxValue / scale + 0.5f);
}
动态添加View
ViewGroup viewGroup = (ViewGroup) getLayoutInflater().inflate(R.layout.main, null);setContentView(viewGroup);
Button button = new Button(this);
button.setText("Heklki");
viewGroup.addView(button);
Button button2 = new Button(this);
button.setText("Heklki2");
button.setPadding(100, 100, 100, 100);
viewGroup.addView(button2);
自定义View中,布局资源使用方法
LayoutInflater i = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);include方法导入公用xml
<include layout="@layout/test_f"/>也可以带上ID
<include
android:id="@+id/test2"
android:layout_height="match_parent"
android:layout_width="wrap_content"
layout="@layout/test" />
如果被导入的xml中,有merge标签,则是合并进来,效率会更加高
<merge xmlns:android="http://schemas.android.com/apk/res/android" >
<LinearLayout
android:id="@+id/test"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/ic_launcher" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
</merge>
解决TableRow中无法显示ImageView的图片问题
LinearLayout layout = (LinearLayout)findViewById(R.id.a);TableLayout tableLayout = new TableLayout(this);
LinearLayout layout1 = new LinearLayout(this);
TableRow row = new TableRow(this);
ImageView img = new ImageView(this);
Bitmap bitmap = BitmapFactory.decodeFile("/sdcard/a.png");//从本地取图片
img.setLayoutParams(new LayoutParams(100,100));
Drawable drawable = new BitmapDrawable(bitmap);
img.setImageDrawable(drawable);
img.setAlpha(255);
System.out.println(drawable);
System.out.println(img.getDrawable());
layout1.addView(img);
row.addView(layout1);
tableLayout.addView(row);
layout.addView(tableLayout);
row和imageView之间加上 linearLayout
ScrollView完全禁止焦点点击上去,需要在代码中设置false
//禁止焦点sc.setFocusable(false);
sc.setFocusableInTouchMode(false);
跨应用调用
Intent intent = new Intent();intent.setClassName("com.xxx.xxx", "com.xxx.xxx.xxxIndex");
startActivity(intent);
XML中自定义焦点移动方向
<Buttonstyle="@style/clockFaceNum"
android:text="11"
android:id="@+id/button11"
android:layout_below="@+id/button12"
android:layout_toLeftOf="@+id/button12"
android:nextFocusUp="@+id/button10"
android:nextFocusLeft="@+id/button10"
android:nextFocusRight="@+id/button12"
android:nextFocusDown="@+id/button12">
</Button>
View.setNextFocusDownId //设置向下焦点
View.setNextFocusLeftId //向左
View.setNextFocusUpId //设置向上
View.setNextFocusRightId //向右
判断EditView值为空
TextUtils.isEmpty(edit.getText()) //为空的判断TextUtils.isEmpty(edit.getText().toString().trim()) //去掉空格
接收短信代码
public class SMSReceiver extends BroadcastReceiver{
/*当收到短信时,就会触发此方法*/
public void onReceive(Context context, Intent intent)
{
Bundle bundle = intent.getExtras();
Object messages[] = (Object[]) bundle.get( "pdus");
SmsMessage smsMessage[] = new SmsMessage[messages.length];
for (int n = 0; n < messages.length; n++)
{
smsMessage
= SmsMessage.createFromPdu(( byte[]) messages
);
}
//产生一个Toast
Toast toast = Toast.makeText(context, "短信内容: " + smsMessage[0].getMessageBody(), Toast.LENGTH_LONG);
//设置toast显示的位置
//toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 200);
//显示该Toast
toast.show();
}
}
XML中需要添加:
<receiver android:name=".SMSReceiver" android:enabled="true">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED"/>
</intent-filter>
</receiver>
命令行常用命令
1. 启动模拟器 android源码目录下 . build/envsetup.sh lunch 1 之后 emulator 即可启动模拟器2. 命令行下看log emulator起来后,用 adb logcat 即可看输出了,还可以加其他过滤选项 3. 命令行下安装应用 adb install ....apk 4. 命令行下进shell adb shell
5. 模拟事件,发短信,打电话等 telnet localhos 5554 之后help看帮助 6. adb shell中看服务 service list 7. 新增一个系统应用 eclipse下的工程文件夹copy到packages/apps/目录下,增加Android.mk LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := $(call all-java-files-under, src) LOCAL_SRC_FILES += \ src/com/example/hellodroid/FullscreenActivity.java \ src/com/example/hellodroid/util/SystemUiHiderBase.java \ src/com/example/hellodroid/util/SystemUiHiderHoneycomb.java \ src/com/example/hellodroid/util/SystemUiHider.java
LOCAL_PACKAGE_NAME := HelloDroid LOCAL_CERTIFICATE := platform
include $(BUILD_PACKAGE)
# Build the test package include $(call all-makefiles-under,$(LOCAL_PATH)) 如果不想被打包安装到system/app下,
LOCAL_MODULE_TAGS := optional ----- LOCAL_MODULE_TAGS := tests 即可. 快速编译的方法是 HelloDroid目录下 mm 命令即可
8. 安装apk错误类型 Failure [INSTALL_FAILED_DEXOPT] 表示没找到DEX,这个一般是系统应用编译后,直接装apk造成的,解决办法是:安装未优化的包 adb install out\target\product\generic\obj\APPS\HelloDroid_intermediates> package.apk.unaligned Failure [INSTALL_FALIED_EXITS]
实际就是应用没变,删除 userdata.img即可 rm out/target/product/generic/userdata* -rf
Failure [INSTALL_FAILED_UID_CHANGED]
你以前安装过这个应用程序,到/data/data下删除完这个程序的包名对应的文件夹, 新安装的会另外生成uid。 装不上是因为检查到原来/data/data下的文件对应uid还是旧的
9. 编译目标可执行程序 Android.mk如下 # # Copyright 2006 The Android Open Source Project # # Android Asset Packaging Tool #
LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS)
LOCAL_SRC_FILES := \ nsurface.cpp
LOCAL_C_INCLUDES := \ $(LOCAL_PATH)/http://www.cnblogs.com/include/ui \ ${LOCAL_PATH}/http://www.cnblogs.com/include/utils \ ${LOCAL_PATH}/http://www.cnblogs.com/include/gui \ external/skia/include/core \ external/skia/include/utils
LOCAL_SHARED_LIBRARIES := \ libcutils \ libutils \ libui \ libgui \ libskia
LOCAL_MODULE := nsurface LOCAL_MODULE_TAGS := optional
include $(BUILD_EXECUTABLE) 9. 快速编译一个模块 模块目录下 mm
10. 模拟器运行系统起不来
排除是修改错误之外,一般是userdata用户数据不一致了 删除userdata,重启模拟器即可 rm out/target/product/generic/userdata* -rf
常用字符串操作归纳
//打印加入变量名的字符串int count = 5;
String text = String. format(getResources().getString(R.string.flip_view_apk_title),count); //这里的count就是替换里面的$d的值
//找到count字符的位置并显示跟整个字符串不同的颜色
String str = count + "";
int index = text.indexOf(str);
int charCount = str.length();
SpannableStringBuilder style= new SpannableStringBuilder(text);
int color = 0xffff00ff;
style.setSpan( new ForegroundColorSpan(color),index,index+charCount,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
TestView.setText(style);
//不同大小的字体
SpannableStringBuilder style = new SpannableStringBuilder(version);
style.setSpan( new AbsoluteSizeSpan(bigSize), 0, 1, Spannable.SPAN_EXCLUSIVE_INCLUSIVE );
style.setSpan( new AbsoluteSizeSpan(normalSize), 1, version.length(), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
verionNameView.setText(style);
strings.xml设置
<string name="test_string">测试(%1$d个) </string>
%1为第一次设置引用的设置
$d为显示的变量格式,为整型
$s为字符串型
$c等等
//打印两位数00
s = String.format("%02d", 1);
格式化后s就是01
//删除线,中划线
priceTextView.setText(Double.toString((6800 / 100.0)));
priceTextView.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);//删除线
priceTextView.getPaint().setAntiAlias(true);//解决画到Bitmap上删除线的字符矩齿的问题
//打印小数点后两位
DecimalFormat mDecimalFormat;
mDecimalFormat = new DecimalFormat("#####.00");
mDecimalFormat.format((Double)(2000/ 1000.0);
获取屏幕分辨率
1. String str = "";2. DisplayMetrics dm = new DisplayMetrics();
3. // getWindowManager().getDefaultDisplay().getMetrics(dm);
4. dm = this.getApplicationContext().getResources().getDisplayMetrics();
5. int screenWidth = dm.widthPixels;
6. int screenHeight = dm.heightPixels;
7. float density = dm.density;
8. float xdpi = dm.xdpi;
9. float ydpi = dm.ydpi;
10. str += "屏幕分辨率为:" + dm.widthPixels + " * " + dm.heightPixels + "\n";
11. str += "绝对宽度:" + String.valueOf(screenWidth) + "pixels\n";
12. str += "绝对高度:" + String.valueOf(screenHeight)
13. + "pixels\n";
14. str += "逻辑密度:" + String.valueOf(density)
15. + "\n";
16. str += "X 维 :" + String.valueOf(xdpi) + "像素每英尺\n";
17. str += "Y 维 :" + String.valueOf(ydpi) + "像素每英尺\n";
18. Log.i("1", str);
使用代码画.9图
NinePatchDrawable bg = (NinePatchDrawable)mContext.getResources().getDrawable(R.drawable.item_bg);bg.setBoundsint left, int top, int right, int bottom;
bg.draw(canvas);
防止应用挂后台后会再次启动新的应用
在应用的第一个activity的oncreate里面加入://当前activity为首页, 如果他前面还有其他的activity,说明用户按过home键
//则无需跑初始化的界面逻辑
ActivityManager am = (ActivityManager) getSystemService( ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> tasklist = am.getRunningTasks(1);
ActivityManager.RunningTaskInfo runTask = tasklist.get(0);
int n = runTask.numActivities ;
if (n != 1) {
finish();
return ;
}
使用自定义字体
// 得到TextView控件对象TextView textView = (TextView) findViewById(R.id.custom);
// 将字体文件保存在assets/fonts/目录下,www.linuxidc.com创建Typeface对象
Typeface typeFace = Typeface.createFromAsset(getAssets(),"fonts/DroidSansThai.ttf");
// 应用字体
textView.setTypeface(typeFace);
Intent几种用法总结
显示网页:Uri uri = Uri.parse("http://www.google.com");
Intent it = new Intent(Intent.ACTION_VIEW,uri);
startActivity(it);
显示地图:
Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = new Intent(Intent.Action_VIEW,uri);
startActivity(it);
路径规划:
Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");
Intent it = new Intent(Intent.ACTION_VIEW,URI);
startActivity(it);
拨打电话: 调用拨号程序
Uri uri = Uri.parse("tel:xxxxxx");
Intent it = new Intent(Intent.ACTION_DIAL, uri);
startActivity(it);
Uri uri = Uri.parse("tel.xxxxxx");
Intent it =new Intent(Intent.ACTION_CALL,uri);
要使用这个必须在配置文件中加入<uses-permission id="android.permission.CALL_PHONE" />
发送SMS/MMS 调用发送短信的程序
Intent it = new Intent(Intent.ACTION_VIEW);
it.putExtra("sms_body", "The SMS text");
it.setType("vnd.android-dir/mms-sms");
startActivity(it);
发送短信
Uri uri = Uri.parse("smsto:0800000123");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
it.putExtra("sms_body", "The SMS text");
startActivity(it);
发送彩信
Uri uri = Uri.parse("content://media/external/images/media/23");
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra("sms_body", "some text");
it.putExtra(Intent.EXTRA_STREAM, uri);
it.setType("image/png");
startActivity(it);
发送Email
Uri uri = Uri.parse("mailto:xxx@abc.com");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(it);
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");
it.putExtra(Intent.EXTRA_TEXT, "The email body text");
it.setType("text/plain");
startActivity(Intent.createChooser(it, "Choose Email Client"));
Intent it=new Intent(Intent.ACTION_SEND);
String[] tos={"me@abc.com"};
String[] ccs={"you@abc.com"};
it.putExtra(Intent.EXTRA_EMAIL, tos);
it.putExtra(Intent.EXTRA_CC, ccs);
it.putExtra(Intent.EXTRA_TEXT, "The email body text");
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
it.setType("message/rfc822");
startActivity(Intent.createChooser(it, "Choose Email Client"));
添加附件
Intent it = new Intent(Intent.ACTION_SEND);
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");
sendIntent.setType("audio/mp3");
startActivity(Intent.createChooser(it, "Choose Email Client"));
播放多媒体
Intent it = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.parse("file:///sdcard/song.mp3");
it.setDataAndType(uri, "audio/mp3");
startActivity(it);
Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
Uninstall 程序
Uri uri = Uri.fromParts("package", strPackageName, null);
Intent it = new Intent(Intent.ACTION_DELETE, uri);
startActivity(it);
跨应用调用
@Overridepublic void onClick(View v) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(Uri.parse("xxx://list"));
intent.putExtra("isShowShoppingCart", "true");
startActivity(intent);
}
被调用的应用中,xml配置
<activity android:name=".activity.StartActivity" >
<intent-filter>
<action android:name="android.intent.action.VIEW"></action>
<category android:name="android.intent.category.DEFAULT"/>
<data android:scheme="xxx" android:host="list"/>
</intent-filter>
</activity>
Activity配置独立进程
这样配置之后,这个Activity就会形成一个单独的进程,进程名称例如:xxx.xx.xxx:DetailActivity一般将逻辑上一起运行的组件配置在一个进程中。如果逻辑上有一定分离的,可以新开一个进程。这样可以降低主进程的空间和时间开销
<activity android:name=".activity.detail.DetailActivity"
android:process=":DetailActivity">
</activity>
ADB命令
安装软件 adb install apk文件名称.apk 重新安装该软件 adb install -r apk文件名称.apk卸载apk软件 adb uninstall apk包名.apk
查看手机上的运行日志,此项可以用来查错 adb logcat
查看手机是否连接,以及连接了几台手机 adb devices
A为手机路径,B为电脑路径,意思为:把文件从手机中复制到电脑上 adb pull <A> <B> A为手机路径,B为电脑路径,意思为:把文件从电脑复制到手机上 adb push <B> <A>
进入手机的超级终端Terminal adb shell
重新挂载文件系统 adb remount
重启手机 adb reboot 重启到Recovery界面 adb reboot recovery 重启到bootloader界面 adb reboot bootloader
例子:刷官方高版本后重新获取ROOT和降级方法(部份操作)
进行adb运行环境 adb shell
设置超级用户模式 su
映射出目录 mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
退出su exit
退出shell准备接受下一个adb命令 exit
增加flash_image文件到手机上 adb push flash_image.zip /system/bin/flash_image
recovery先复制到卡上 adb push recovery-RA-heroc-v1.6.2.img /sdcard
再次进入adb环境 adb shell
修改文件属性 chmod 0755 /system/bin/flash_image
重启系统 reboot
am启动一个应用
am start -n com.xx.xx/com.xx.xx.activity.WelcomeActivity画一个View对象
CategoryTitleView goodTitleView = new CategoryTitleView(mContext, null);Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas2 = new Canvas(bitmap);
goodTitleView.setView(mItemData);
goodTitleView.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.EXACTLY));
goodTitleView.layout(0, 0, getWidth(), getHeight());
goodTitleView.draw(canvas2);
canvas.drawBitmap(bitmap, 0, 0, null);
drawBitmap 使用
// GameView.drawImage(canvas, mBitDestTop, miDTX, mBitQQ.getHeight(), mBitDestTop.getWidth(), mBitDestTop.getHeight()/2, 0, 0);public static void drawImage(Canvas canvas, Bitmap blt, int x, int y, int w, int h, int bx, int by)
{ //x,y表示绘画的起点,
Rect src = new Rect();// 图片
Rect dst = new Rect();// 屏幕位置及尺寸
//src 这个是表示绘画图片的大小
src.left = bx; //0,0
src.top = by;
src.right = bx + w;// mBitDestTop.getWidth();,这个是桌面图的宽度,
src.bottom = by + h;//mBitDestTop.getHeight()/2;// 这个是桌面图的高度的一半
// 下面的 dst 是表示 绘画这个图片的位置
dst.left = x; //miDTX,//这个是可以改变的,也就是绘图的起点X位置
dst.top = y; //mBitQQ.getHeight();//这个是QQ图片的高度。 也就相当于 桌面图片绘画起点的Y坐标
dst.right = x + w; //miDTX + mBitDestTop.getWidth();// 表示需绘画的图片的右上角
dst.bottom = y + h; // mBitQQ.getHeight() + mBitDestTop.getHeight();//表示需绘画的图片的右下角
canvas.drawBitmap(blt, src, dst, null);//这个方法 第一个参数是图片原来的大小,第二个参数是 绘画该图片需显示多少。也就是说你想绘画该图片的某一些地方,而不是全部图片,第三个参数表示该图片绘画的位置
src = null;
dst = null;
}
动态设置左右图标
Drawable img_on, img_off;Resources res = getResources();
img_off = res.getDrawable(R.drawable.btn_strip_mark_off);
//调用setCompoundDrawables时,必须调用Drawable.setBounds()方法,否则图片不显示
img_off.setBounds(0, 0, img_off.getMinimumWidth(), img_off.getMinimumHeight());
btn.setCompoundDrawables(img_off, null, null, null); //设置左图标
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