使用sharedpreferences在另一个活动中使用edittext在android小部件中设置textview [英] Set textview inside android widget from edittext in another activity using sharedpreferences
本文介绍了使用sharedpreferences在另一个活动中使用edittext在android小部件中设置textview的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
I wrote a program to my friend to calculate the fuel litres and prices
It's a simple layout that let him enter all the counters of the fuel machines and the prices and then within a button click all the results will show in a specific textviews
MainActivity Class
public class MainActivity extends Activity
{
Button result;
EditText b951,b952,b953,b954,b955,b956,b981,b982,b983,b984,b985,b986,red1,green1;
EditText b9511,b9522,b9533,b9544,b9555,b9566,b9811,b9822,b9833,b9844,b9855,b9866,red2,green2,oil;
EditText sum95,sum98,sumred,sumgreen;
EditText total,t95,t98,tred,tgreen;
EditText p95,p98,pred,pgreen;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
result = (Button)findViewById(R.id.btn1);
b951 = (EditText)findViewById(R.id.b951);
b952 = (EditText)findViewById(R.id.b952);
b953 = (EditText)findViewById(R.id.b953);
b954 = (EditText)findViewById(R.id.b954);
b955 = (EditText)findViewById(R.id.b955);
b956 = (EditText)findViewById(R.id.b956);
b981 = (EditText)findViewById(R.id.b981);
b982 = (EditText)findViewById(R.id.b982);
b983 = (EditText)findViewById(R.id.b983);
b984 = (EditText)findViewById(R.id.b984);
b985 = (EditText)findViewById(R.id.b985);
b986 = (EditText)findViewById(R.id.b986);
red1 = (EditText)findViewById(R.id.red1);
green1 = (EditText)findViewById(R.id.green1);
b9511 = (EditText)findViewById(R.id.b9511);
b9522 = (EditText)findViewById(R.id.b9522);
b9533 = (EditText)findViewById(R.id.b9533);
b9544 = (EditText)findViewById(R.id.b9544);
b9555 = (EditText)findViewById(R.id.b9555);
b9566 = (EditText)findViewById(R.id.b9566);
b9811 = (EditText)findViewById(R.id.b9811);
b9822 = (EditText)findViewById(R.id.b9822);
b9833 = (EditText)findViewById(R.id.b9833);
b9844 = (EditText)findViewById(R.id.b9844);
b9855 = (EditText)findViewById(R.id.b9855);
b9866 = (EditText)findViewById(R.id.b9866);
red2 = (EditText)findViewById(R.id.red2);
green2 = (EditText)findViewById(R.id.green2);
oil = (EditText)findViewById(R.id.oil);
sum95 = (EditText)findViewById(R.id.sum95);
sum98 = (EditText)findViewById(R.id.sum98);
sumred = (EditText)findViewById(R.id.sumred);
sumgreen = (EditText)findViewById(R.id.sumgreen);
p95 = (EditText)findViewById(R.id.p95);
p98 = (EditText)findViewById(R.id.p98);
pred = (EditText)findViewById(R.id.pred);
pgreen = (EditText)findViewById(R.id.pgreen);
total = (EditText)findViewById(R.id.total);
t95 = (EditText)findViewById(R.id.t95);
t98 = (EditText)findViewById(R.id.t98);
tred = (EditText)findViewById(R.id.tred);
tgreen = (EditText)findViewById(R.id.tgreen);
LoadPreferences();
}
public void clear (View v){
b951.setText("");
b9511.setText("");
b952.setText("");
b9522.setText("");
b953.setText("");
b9533.setText("");
b954.setText("");
b9544.setText("");
b955.setText("");
b9555.setText("");
b956.setText("");
b9566.setText("");
b981.setText("");
b9811.setText("");
b982.setText("");
b9822.setText("");
b983.setText("");
b9833.setText("");
b984.setText("");
b9844.setText("");
b985.setText("");
b9855.setText("");
b986.setText("");
b9866.setText("");
red1.setText("");
red2.setText("");
green1.setText("");
green2.setText("");
oil.setText("");
p95.setText("");
p98.setText("");
pred.setText("");
pgreen.setText("");
sum95.setText("");
sum98.setText("");
sumred.setText("");
sumgreen.setText("");
t95.setText("");
t98.setText("");
tred.setText("");
tgreen.setText("");
total.setText("");
}
public void close (View v){
SavePreferences("p2b951", b951.getText().toString());
SavePreferences("p2b9511", b9511.getText().toString());
SavePreferences("p2b952", b952.getText().toString());
SavePreferences("p2b9522", b9522.getText().toString());
SavePreferences("p2b953", b953.getText().toString());
SavePreferences("p2b9533", b9533.getText().toString());
SavePreferences("p2b954", b954.getText().toString());
SavePreferences("p2b9544", b9544.getText().toString());
SavePreferences("p2b955", b955.getText().toString());
SavePreferences("p2b9555", b9555.getText().toString());
SavePreferences("p2b956", b956.getText().toString());
SavePreferences("p2b9566", b9566.getText().toString());
SavePreferences("p2b981", b981.getText().toString());
SavePreferences("p2b9811", b9811.getText().toString());
SavePreferences("p2b982", b982.getText().toString());
SavePreferences("p2b9822", b9822.getText().toString());
SavePreferences("p2b983", b983.getText().toString());
SavePreferences("p2b9833", b9833.getText().toString());
SavePreferences("p2b984", b984.getText().toString());
SavePreferences("p2b9844", b9844.getText().toString());
SavePreferences("p2b985", b985.getText().toString());
SavePreferences("p2b9855", b9855.getText().toString());
SavePreferences("p2b986", b986.getText().toString());
SavePreferences("p2b9866", b9866.getText().toString());
SavePreferences("p2red1", red1.getText().toString());
SavePreferences("p2red2", red2.getText().toString());
SavePreferences("p2green1", green1.getText().toString());
SavePreferences("p2green2", green2.getText().toString());
SavePreferences("p2oil", oil.getText().toString());
SavePreferences("p2p95", p95.getText().toString());
SavePreferences("p2p98", p98.getText().toString());
SavePreferences("p2pred", pred.getText().toString());
SavePreferences("p2pgreen", pgreen.getText().toString());
finish();
}
private void SavePreferences(String key, String value){
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(key, value);
editor.commit();
}
private void LoadPreferences(){
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
String p1b951 = sharedPreferences.getString("p2b951", "");
String p1b9511 = sharedPreferences.getString("p2b9511", "");
String p1b952 = sharedPreferences.getString("p2b952", "");
String p1b9522 = sharedPreferences.getString("p2b9522", "");
String p1b953 = sharedPreferences.getString("p2b953", "");
String p1b9533 = sharedPreferences.getString("p2b9533", "");
String p1b954 = sharedPreferences.getString("p2b954", "");
String p1b9544 = sharedPreferences.getString("p2b9544", "");
String p1b955 = sharedPreferences.getString("p2b955", "");
String p1b9555 = sharedPreferences.getString("p2b9555", "");
String p1b956 = sharedPreferences.getString("p2b956", "");
String p1b9566 = sharedPreferences.getString("p2b9566", "");
String p1b981 = sharedPreferences.getString("p2b981", "");
String p1b9811 = sharedPreferences.getString("p2b9811", "");
String p1b982 = sharedPreferences.getString("p2b982", "");
String p1b9822 = sharedPreferences.getString("p2b9822", "");
String p1b983 = sharedPreferences.getString("p2b983", "");
String p1b9833 = sharedPreferences.getString("p2b9833", "");
String p1b984 = sharedPreferences.getString("p2b984", "");
String p1b9844 = sharedPreferences.getString("p2b9844", "");
String p1b985 = sharedPreferences.getString("p2b985", "");
String p1b9855 = sharedPreferences.getString("p2b9855", "");
String p1b986 = sharedPreferences.getString("p2b986", "");
String p1b9866 = sharedPreferences.getString("p2b9866", "");
String p1red1 = sharedPreferences.getString("p2red1", "");
String p1red2 = sharedPreferences.getString("p2red2", "");
String p1green1 = sharedPreferences.getString("p2green1", "");
String p1green2 = sharedPreferences.getString("p2green2", "");
String p1oil = sharedPreferences.getString("p2oil", "");
String p1p95 = sharedPreferences.getString("p2p95", "");
String p1p98 = sharedPreferences.getString("p2p98", "");
String p1pred = sharedPreferences.getString("p2pred", "");
String p1pgreen = sharedPreferences.getString("p2pgreen", "");
b951.setText(p1b951);
b9511.setText(p1b9511);
b952.setText(p1b952);
b9522.setText(p1b9522);
b953.setText(p1b953);
b9533.setText(p1b9533);
b954.setText(p1b954);
b9544.setText(p1b9544);
b955.setText(p1b955);
b9555.setText(p1b9555);
b956.setText(p1b956);
b9566.setText(p1b9566);
b981.setText(p1b981);
b9811.setText(p1b9811);
b982.setText(p1b982);
b9822.setText(p1b9822);
b983.setText(p1b983);
b9833.setText(p1b9833);
b984.setText(p1b984);
b9844.setText(p1b9844);
b985.setText(p1b985);
b9855.setText(p1b9855);
b986.setText(p1b986);
b9866.setText(p1b9866);
red1.setText(p1red1);
red2.setText(p1red2);
green1.setText(p1green1);
green2.setText(p1green2);
oil.setText(p1oil);
p95.setText(p1p95);
p98.setText(p1p98);
pred.setText(p1pred);
pgreen.setText(p1pgreen);
}
public void result (View v){
try
{
int ib951 = Integer.parseInt(b951.getText().toString());
int ib952 = Integer.parseInt(b952.getText().toString());
int ib953 = Integer.parseInt(b953.getText().toString());
int ib954 = Integer.parseInt(b954.getText().toString());
int ib955 = Integer.parseInt(b955.getText().toString());
int ib956 = Integer.parseInt(b956.getText().toString());
int ib981 = Integer.parseInt(b981.getText().toString());
int ib982 = Integer.parseInt(b982.getText().toString());
int ib983 = Integer.parseInt(b983.getText().toString());
int ib984 = Integer.parseInt(b984.getText().toString());
int ib985 = Integer.parseInt(b985.getText().toString());
int ib986 = Integer.parseInt(b986.getText().toString());
int ib9511 = Integer.parseInt(b9511.getText().toString());
int ib9522 = Integer.parseInt(b9522.getText().toString());
int ib9533 = Integer.parseInt(b9533.getText().toString());
int ib9544 = Integer.parseInt(b9544.getText().toString());
int ib9555 = Integer.parseInt(b9555.getText().toString());
int ib9566 = Integer.parseInt(b9566.getText().toString());
int ib9811 = Integer.parseInt(b9811.getText().toString());
int ib9822 = Integer.parseInt(b9822.getText().toString());
int ib9833 = Integer.parseInt(b9833.getText().toString());
int ib9844 = Integer.parseInt(b9844.getText().toString());
int ib9855 = Integer.parseInt(b9855.getText().toString());
int ib9866 = Integer.parseInt(b9866.getText().toString());
int ired1 = Integer.parseInt(red1.getText().toString());
int igreen1 = Integer.parseInt(green1.getText().toString());
int ired2 = Integer.parseInt(red2.getText().toString());
int igreen2 = Integer.parseInt(green2.getText().toString());
int iisum95 = ((ib9511-ib951)+(ib9522-ib952)+(ib9533-ib953)+(ib9544-ib954)+(ib9555-ib955)+(ib9566-ib956));
sum95.setText(String.valueOf(iisum95));
int iisum98 = ((ib9811-ib981)+(ib9822-ib982)+(ib9833-ib983)+(ib9844-ib984)+(ib9855-ib985)+(ib9866-ib986));
sum98.setText(String.valueOf(iisum98));
int iisumred = (ired2-ired1);
sumred.setText(String.valueOf(iisumred));
int iisumgreen = (igreen2-igreen1);
sumgreen.setText(String.valueOf(iisumgreen));
int isum95 = Integer.parseInt(sum95.getText().toString());
int isum98 = Integer.parseInt(sum98.getText().toString());
int isumred = Integer.parseInt(sumred.getText().toString());
int isumgreen = Integer.parseInt(sumgreen.getText().toString());
int ip95 = Integer.parseInt(p95.getText().toString());
int ip98 = Integer.parseInt(p98.getText().toString());
int ipred = Integer.parseInt(pred.getText().toString());
int ipgreen = Integer.parseInt(pgreen.getText().toString());
int pp95 = (isum95*ip95);
t95.setText(String.valueOf(pp95));
int pp98 = (isum98*ip98);
t98.setText(String.valueOf(pp98));
int ppred = (isumred*ipred);
tred.setText(String.valueOf(ppred));
int ppgreen = (isumgreen*ipgreen);
tgreen.setText(String.valueOf(ppgreen));
int it95 = Integer.parseInt(t95.getText().toString());
int it98 = Integer.parseInt(t98.getText().toString());
int itred = Integer.parseInt(tred.getText().toString());
int itgreen = Integer.parseInt(tgreen.getText().toString());
int itoil = Integer.parseInt(oil.getText().toString());
int ttotal = (it95+it98+itred+itgreen+itoil);
total.setText(String.valueOf(ttotal));
}
catch (Exception e)
{
e.printStackTrace();
}
}
@Override
public void onBackPressed()
{
// TODO: Implement this method
}
}
Widget Class
public class Widget extends AppWidgetProvider
{
TextView b95;
public void onReceive(Context context, Intent intent)
{
//LoadPreferences();
String action = intent.getAction();
if (AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(action))
{
RemoteViews views = new RemoteViews(context.getPackageName(),
R.layout.widget);
AppWidgetManager
.getInstance(context)
.updateAppWidget(
intent.getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS),
views);
}
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
{
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
SharedPreferences p1b95 = context.getSharedPreferences("p1p95", 0);
int p2b95 = p1b95.getInt("p1p95", 0);
views.setTextViewText(R.id.b95, String.valueOf(p2b95));
appWidgetManager.updateAppWidget(appWidgetIds, views);
}
}
My widget is to show the fuel prices on the homescreen
Everything is ok with the app but my problem is that I cant show the prices in the textviews they are empty
I just want to show price for one type of fuel in the widget
Please can someone help me and let me know what's wrong with my code
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