桌面部件--恋爱小插件

先写桌面部件的布局 widget_love.xml :

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:layout_width="300dp" android:layout_height="200dp" android:id="@+id/widget_img"/> <TextView android:layout_gravity="center_horizontal" android:textColor="@color/colorPrimary" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="22sp" android:id="@+id/boy_girl_name"/> <TextView android:layout_gravity="center_horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" android:textColor="@android:color/holo_red_dark" android:id="@+id/record"/> </LinearLayout>

写一个xml, 设置初始显示的布局

<?xml version="1.0" encoding="utf-8"?> <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" android:minHeight="300dp" android:minWidth="400dp" android:updatePeriodMillis="0" android:previewImage="@mipmap/ic_launcher" android:initialLayout="@layout/widget_love"> //这里是初始显示上面定义好的布局 </appwidget-provider>

然后就是定义provider继承 AppWidgetProvider

package com.example.loverappwidget; import android.app.Service; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProvider; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.widget.RemoteViews; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; /** * Created by uwei on 2018/2/17. */ public class LoveRecordWidgetProvider extends AppWidgetProvider { private static String mDate; private static String mTime; private static String boy_name; private static String girl_name; static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) { boy_name = context.getSharedPreferences("setting", Context.MODE_PRIVATE).getString("boy_name", ""); girl_name = context.getSharedPreferences("setting", Context.MODE_PRIVATE).getString("girl_name", ""); mDate = context.getSharedPreferences("setting", Context.MODE_PRIVATE).getString("date", ""); mTime = context.getSharedPreferences("setting", Context.MODE_PRIVATE).getString("time", ""); String widgetText = boy_name + " 与 " + girl_name; RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_love); views.setTextViewText(R.id.boy_girl_name, widgetText); String path = context.getFilesDir().getPath() + File.separator + SetActivity.IMAGE_FILE_NAME; InputStream is = null; try { is = new FileInputStream(path); Bitmap bitmap = BitmapFactory.decodeStream(is); views.setImageViewBitmap(R.id.widget_img, bitmap); } catch (FileNotFoundException e) { e.printStackTrace(); } appWidgetManager.updateAppWidget(appWidgetId, views); } @Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { // There may be multiple widgets active, so update all of the for (int appWidgetId : appWidgetIds) { updateAppWidget(context, appWidgetManager, appWidgetId); } Intent intent = new Intent(context,RecordService.class); //启动service，更新计时的时间 context.startService(intent); } @Override public void onEnabled(Context context) { // Enter relevant functionality for when the first widget is created super.onEnabled(context); Intent intent = new Intent(context,RecordService.class); context.startService(intent); } @Override public void onDisabled(Context context) { // Enter relevant functionality for when the last widget is disabled Intent intent = new Intent(context,RecordService.class); context.stopService(intent); } @Override public void onReceive(Context context, Intent intent) { boy_name = context.getSharedPreferences("setting", Context.MODE_PRIVATE).getString("boy_name", ""); girl_name = context.getSharedPreferences("setting", Context.MODE_PRIVATE).getString("girl_name", ""); super.onReceive(context, intent); AppWidgetManager manager = AppWidgetManager.getInstance(context); RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.widget_love); views.setTextViewText(R.id.boy_girl_name,boy_name + " 与 " + girl_name); InputStream is = null; try { String path = context.getFilesDir().getPath() + File.separator + SetActivity.IMAGE_FILE_NAME; is = new FileInputStream(path); Bitmap bitmap = BitmapFactory.decodeStream(is); views.setImageViewBitmap(R.id.widget_img, bitmap); } catch (FileNotFoundException e) { e.printStackTrace(); } ComponentName componentName = new ComponentName(context,LoveRecordWidgetProvider.class); manager.updateAppWidget(componentName,views); Intent service = new Intent(context,RecordService.class); context.startService(service); } }

界面设置代码:

package com.example.loverappwidget; import android.Manifest; import android.app.DatePickerDialog; import android.app.TimePickerDialog; import android.appwidget.AppWidgetManager; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Build; import android.os.Environment; import android.provider.MediaStore; import android.support.annotation.NonNull; import android.support.annotation.RequiresApi; import android.support.design.widget.Snackbar; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.DatePicker; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; import android.widget.TimePicker; import android.widget.Toast; import org.w3c.dom.Text; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.util.Calendar; public class SetActivity extends AppCompatActivity { private ImageView mChooseImg; private TextView mChooseTime; private TextView mChooseDate; private TextView mShowDate, mShowTime; private EditText mBoyName, mGirlName,mShowTitle; private final int IMAGE_REQUEST_CODE = 0x123; private final int PHOTO_REQUEST_CUT = 0x125; private final int SHOW_PHOTO = 0x124; public static final String IMAGE_FILE_NAME = "CropedImgName.jpg"; private String mTime, mDate; private Uri uritempFile; private Button mSave; private Button mSetImg; @RequiresApi(api = Build.VERSION_CODES.M) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_set); mChooseImg = findViewById(R.id.choose_img); mChooseTime = findViewById(R.id.choose_time); mChooseDate = findViewById(R.id.choose_date); mShowDate = findViewById(R.id.show_date); mShowTime = findViewById(R.id.show_time); mBoyName = findViewById(R.id.boy_name); mGirlName = findViewById(R.id.girl_name); mShowTitle = findViewById(R.id.show_title); mSave = findViewById(R.id.save); mSetImg = findViewById(R.id.choose_img_btn); if(!hasPermission()){ requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},0); } init(); mSave.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mDate == null || mTime == null) { Snackbar.make(v, "请完整设置好信息", Snackbar.LENGTH_SHORT).show(); } SharedPreferences sharedPreferences = getSharedPreferences("setting",MODE_PRIVATE); sharedPreferences.edit().putString("boy_name", mBoyName.getText().toString()) .putString("girl_name", mGirlName.getText().toString()) .putString("title", mShowTitle.getText().toString()) .putString("date", mDate ) .putString("time",mTime).commit(); Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); sendBroadcast(intent); Toast.makeText(SetActivity.this,"保存成功",Toast.LENGTH_SHORT).show(); } }); mChooseImg.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent( Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); // 打开手机相册,设置请求码 startActivityForResult(intent, IMAGE_REQUEST_CODE); } }); mSetImg.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent( Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); // 打开手机相册,设置请求码 startActivityForResult(intent, IMAGE_REQUEST_CODE); } }); mChooseTime.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Calendar c = Calendar.getInstance(); new TimePickerDialog(SetActivity.this, new TimePickerDialog.OnTimeSetListener() { @Override public void onTimeSet(TimePicker view, int hourOfDay, int minute) { mShowTime.setText(hourOfDay + "时" + minute + "分"); mTime = "" + hourOfDay + ":" + minute + ":" + 00; } }, c.get(Calendar.HOUR), c.get(Calendar.MINUTE), true).show(); } }); mChooseDate.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Calendar c = Calendar.getInstance(); new DatePickerDialog(SetActivity.this, new DatePickerDialog.OnDateSetListener() { @Override public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) { mShowDate.setText(year + "年" + (month + 1) + "月" + dayOfMonth + "日"); mDate = "" + year + "-" + (month + 1) + "-" + dayOfMonth; } }, c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH)).show(); } }); } @RequiresApi(api = Build.VERSION_CODES.M) @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode != RESULT_OK) { return; } else { switch (requestCode) { case IMAGE_REQUEST_CODE: if (resultCode == RESULT_OK) {//resultcode是setResult里面设置的code值 try { Uri selectedImage = data.getData(); //获取系统返回的照片的Uri String[] filePathColumn = {MediaStore.Images.Media.DATA}; Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);//从系统表中查询指定Uri对应的照片 cursor.moveToFirst(); int columnIndex = cursor.getColumnIndex(filePathColumn[0]); String path = cursor.getString(columnIndex); //获取照片路径 cursor.close(); Bitmap bitmap = getSmallBitmap(path); mChooseImg.setImageBitmap(bitmap); getSharedPreferences("setting",MODE_PRIVATE).edit().putString("path",path).commit(); } catch (Exception e) { // TODO Auto-generatedcatch block e.printStackTrace(); } } break; case PHOTO_REQUEST_CUT: Bitmap bitmap = null; try { bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uritempFile)); } catch (FileNotFoundException e) { e.printStackTrace(); } Drawable drawable = new BitmapDrawable(bitmap); mChooseImg.setBackground(drawable); String path = getFilesDir().getPath() + File.separator + IMAGE_FILE_NAME; File file = new File(path); FileOutputStream outputStream = null; try { outputStream = new FileOutputStream(file); } catch (FileNotFoundException e) { e.printStackTrace(); } bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream); //TODO，将裁剪的bitmap显示在imageview控件上 break; } } } private void init(){ SharedPreferences sharedPreferences = getSharedPreferences("setting", MODE_PRIVATE); mDate = sharedPreferences.getString("date",null); mTime = sharedPreferences.getString("time",null); mBoyName.setText(sharedPreferences.getString("boy_name","")); mGirlName.setText(sharedPreferences.getString("girl_name","")); mShowDate.setText(sharedPreferences.getString("date","未设置日期")); mShowTime.setText(sharedPreferences.getString("time","未设置时间")); mShowTitle.setText(sharedPreferences.getString("title","未设置前缀")); // String path = getFilesDir().getPath() + File.separator + IMAGE_FILE_NAME; String path = getSharedPreferences("setting",MODE_PRIVATE).getString("path",null); if(path == null){ return; } Bitmap bitmap = getSmallBitmap(path); mChooseImg.setImageBitmap(bitmap); } public boolean hasPermission(){ int result = ContextCompat .checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE); return result == PackageManager.PERMISSION_GRANTED; } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case 0: { //这个0是requestCode，上面requestPermissions有用到 // If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { Toast.makeText(this, "已获取权限,可以设置图片", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(this, "您拒绝了写文件权限，无法设置图片", Toast.LENGTH_SHORT).show(); } return; } } } private Bitmap getSmallBitmap(String path){ BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; Bitmap bitmap = BitmapFactory.decodeFile(path,options); float w = options.outWidth; float h = options.outHeight; options.inJustDecodeBounds = false; float ww = 240f; float hh = 400f; int scale = Math.max(Math.round(w/ww),Math.round(h/hh)); options.inSampleSize = scale; return BitmapFactory.decodeFile(path,options); } }

Service代码

package com.example.loverappwidget; import android.app.Service; import android.appwidget.AppWidgetManager; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.os.IBinder; import android.support.annotation.Nullable; import android.util.Log; import android.widget.RemoteViews; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Timer; import java.util.TimerTask; /** * Created by uwei on 2018/2/18. */ public class RecordService extends Service { @Nullable @Override public IBinder onBind(Intent intent) { return null; } @Override public void onCreate() { super.onCreate(); new Thread(new Runnable() { @Override public void run() { new Timer().schedule(new TimerTask() { @Override public void run() { update(); } },0,1000); } }).start(); } public void update(){ String mDate = getSharedPreferences("setting", Context.MODE_PRIVATE).getString("date", ""); String mTime = getSharedPreferences("setting", Context.MODE_PRIVATE).getString("time", ""); String mTitle = getSharedPreferences("setting", Context.MODE_PRIVATE).getString("title", ""); String beginTime = mDate + " " + mTime; Log.d("ww",beginTime); SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date now = new Date(); try { Date begin = df.parse(beginTime); long l = now.getTime() - begin.getTime(); Log.d("ww",now+""); Log.d("ww",begin+""); long day = l / (24 * 60 * 60 * 1000); long hour = (l / (60 * 60 * 1000) - day * 24); long min = ((l / (60 * 1000)) - day * 24 * 60 - hour * 60); long s = (l / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60); RemoteViews views = new RemoteViews(getPackageName(), R.layout.widget_love); Log.d("ww",""+day+"天"+hour+"小时"+min+"分"+s+"秒"); views.setTextViewText(R.id.record, mTitle +": " + day + "天" + hour + "小时" + min + "分" + s + "秒"); AppWidgetManager manager = AppWidgetManager.getInstance(this); ComponentName componentName = new ComponentName(this, LoveRecordWidgetProvider.class); //调用APPWidgetManager将RemoteViews添加到ComponentName中 manager.updateAppWidget(componentName, views); } catch (ParseException e) { e.printStackTrace(); } } @Override public int onStartCommand(Intent intent, int flags, int startId) { flags = START_STICKY; //防止因内存不足而销毁service，所以设置成START_STICKY，当因内存不足销毁后会自动启动 return super.onStartCommand(intent, flags, startId); } } 

@Override public int onStartCommand(Intent intent, int flags, int startId) { flags = START_STICKY; //防止因内存不足而销毁service，所以设置成START_STICKY，当因内存不足销毁后会自动启动 return super.onStartCommand(intent, flags, startId); }

如果桌面小部件不显示widget的话，

加上

minResizeHeight,minResizeWidth就可以

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