的setText无法显示在一个TextView一个数字作为文本 [英] setText fails to show a number as text in a TextView
问题描述
我有4个按钮和1 TextView中。我想每个按钮来添加或从TextView中的值(解析为int)减去一个不同量。当我点击一个按钮,它抛出致命错误(如下所示)。我搜索其他一些讨论#1并没有什么似乎工作。这是我当前的活动:
公共类PaydownSnowball延伸活动{
诠释AAMT;
字符串debtExtraPayment;
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.snowball);
最终按钮plusTen =(按钮)findViewById(R.id.buttonp10);
最终按钮plusFive =(按钮)findViewById(R.id.buttonp5);
最终按钮minusFive =(按钮)findViewById(R.id.buttonm5);
最终按钮minusTen =(按钮)findViewById(R.id.buttonm10);
共享preferences共享preF = getShared preferences(chaosdatasnowball,0);
debtExtraPayment =共享pref.getString(debtExtraPayment,NULL);
debtExtraPayment =0;
TextView的addAmount =(TextView中)findViewById(R.id.dispAddAmt);
addAmount.setText(debtExtraPayment);
AAMT =的Integer.parseInt(debtExtraPayment);
plusTen.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
AAMT = AAMT + 10;
TextView的addAmount =(TextView中)findViewById(R.id.dispAddAmt);
addAmount.setText(AAMT);
}
});
plusFive.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
AAMT = AAMT + 5;
TextView的addAmount =(TextView中)findViewById(R.id.dispAddAmt);
addAmount.setText(AAMT);
}
});
minusTen.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
AAMT = AAMT - 10;
TextView的addAmount =(TextView中)findViewById(R.id.dispAddAmt);
addAmount.setText(AAMT);
}
});
minusFive.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
AAMT = AAMT - 5;
TextView的addAmount =(TextView中)findViewById(R.id.dispAddAmt);
addAmount.setText(AAMT);
}
});
debtExtraPayment =将String.valueOf(AAMT);
addAmount.setText(debtExtraPayment);
共享preferences.Editor编辑=共享pref.edit();
editor.putString(debtExtraPayment,debtExtraPayment).commit();
}
下面是上点击plusFive按钮出现的logcats:
11-09 15:15:57.907:E / AndroidRuntime(695):致命异常:主要
11-09 15:15:57.907:E / AndroidRuntime(695):android.content.res.Resources $ NotFoundException:字符串资源ID#0x5的
11-09 15:15:57.907:E / AndroidRuntime(695):在android.content.res.Resources.getText(Resources.java:201)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.widget.TextView.setText(TextView.java:2817)
11-09 15:15:57.907:E / AndroidRuntime(695):在biz.midl.debtsnowball.PaydownSnowball $ 2.onClick(PaydownSnowball.java:47)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.view.View.performClick(View.java:2408)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.view.View $ PerformClick.run(View.java:8816)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.os.Handler.handleCallback(Handler.java:587)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.os.Handler.dispatchMessage(Handler.java:92)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.os.Looper.loop(Looper.java:123)
11-09 15:15:57.907:E / AndroidRuntime(695):在android.app.ActivityThread.main(ActivityThread.java:4627)
11-09 15:15:57.907:E / AndroidRuntime(695):在java.lang.reflect.Method.invokeNative(本机方法)
11-09 15:15:57.907:E / AndroidRuntime(695):在java.lang.reflect.Method.invoke(Method.java:521)
11-09 15:15:57.907:E / AndroidRuntime(695):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
11-09 15:15:57.907:E / AndroidRuntime(695):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-09 15:15:57.907:E / AndroidRuntime(695):在dalvik.system.NativeStart.main(本机方法)
11-09 15:15:59.467:I /处理(695):发送信号。 PID:695 SIG:9
这个问题是这样的行
addAmount.setText(AAMT);
其中, AAMT
是 INT
。这看起来对资源
与 ID
任何的 AAMT
是。您需要将其转换为字符串
第一像
addAmount.setText(将String.valueOf(AAMT));
有超载的setText()
的方法。 见
I have 4 buttons and 1 TextView. I want each of the buttons to add or subtract a different amount from the value (parsed to int) in the TextView. When I click on one of the buttons it throws fatal errors (listed below). I've searched some other Stackoverflow discussions and nothing seems to be working. Here is my current activity:
public class PaydownSnowball extends Activity {
int aAmt;
String debtExtraPayment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.snowball);
final Button plusTen = (Button) findViewById(R.id.buttonp10);
final Button plusFive = (Button) findViewById(R.id.buttonp5);
final Button minusFive = (Button) findViewById(R.id.buttonm5);
final Button minusTen = (Button) findViewById(R.id.buttonm10);
SharedPreferences sharedPref= getSharedPreferences("chaosdatasnowball", 0);
debtExtraPayment = sharedPref.getString("debtExtraPayment", null);
debtExtraPayment ="0";
TextView addAmount = (TextView) findViewById(R.id.dispAddAmt);
addAmount.setText(debtExtraPayment);
aAmt = Integer.parseInt(debtExtraPayment);
plusTen.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
aAmt = aAmt + 10;
TextView addAmount = (TextView) findViewById(R.id.dispAddAmt);
addAmount.setText(aAmt);
}
});
plusFive.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
aAmt = aAmt + 5;
TextView addAmount = (TextView) findViewById(R.id.dispAddAmt);
addAmount.setText(aAmt);
}
});
minusTen.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
aAmt = aAmt - 10;
TextView addAmount = (TextView) findViewById(R.id.dispAddAmt);
addAmount.setText(aAmt);
}
});
minusFive.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
aAmt = aAmt - 5;
TextView addAmount = (TextView) findViewById(R.id.dispAddAmt);
addAmount.setText(aAmt);
}
});
debtExtraPayment = String.valueOf(aAmt);
addAmount.setText(debtExtraPayment);
SharedPreferences.Editor editor= sharedPref.edit();
editor.putString("debtExtraPayment", debtExtraPayment).commit();
}
Here are the logcats that occur on click of the plusFive button:
11-09 15:15:57.907: E/AndroidRuntime(695): FATAL EXCEPTION: main
11-09 15:15:57.907: E/AndroidRuntime(695): android.content.res.Resources$NotFoundException: String resource ID #0x5
11-09 15:15:57.907: E/AndroidRuntime(695): at android.content.res.Resources.getText(Resources.java:201)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.widget.TextView.setText(TextView.java:2817)
11-09 15:15:57.907: E/AndroidRuntime(695): at biz.midl.debtsnowball.PaydownSnowball$2.onClick(PaydownSnowball.java:47)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.view.View.performClick(View.java:2408)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.view.View$PerformClick.run(View.java:8816)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.os.Handler.handleCallback(Handler.java:587)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.os.Handler.dispatchMessage(Handler.java:92)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.os.Looper.loop(Looper.java:123)
11-09 15:15:57.907: E/AndroidRuntime(695): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-09 15:15:57.907: E/AndroidRuntime(695): at java.lang.reflect.Method.invokeNative(Native Method)
11-09 15:15:57.907: E/AndroidRuntime(695): at java.lang.reflect.Method.invoke(Method.java:521)
11-09 15:15:57.907: E/AndroidRuntime(695): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-09 15:15:57.907: E/AndroidRuntime(695): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-09 15:15:57.907: E/AndroidRuntime(695): at dalvik.system.NativeStart.main(Native Method)
11-09 15:15:59.467: I/Process(695): Sending signal. PID: 695 SIG: 9
The problem is with lines like this
addAmount.setText(aAmt);
where aAmt
is an int
. This looks for a resource
with the id
of whatever aAmt
is. You need to cast it to a String
first like
addAmount.setText(String.valueOf(aAmt));
There are overloaded setText()
methods. See the docs
This post goes into some more detail as to how this actually works
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