我不僅是新的到Android工作室,我是新來的,一般的編程(我一直在慢慢地教自己,我能在過去一年左右作爲業餘愛好)。的Android應用程序崩潰,一旦重新打開
我碰到我的Android應用程序的問題,我無法找到答案 - 儘管我知道很多人都問過類似的問題,我似乎無法理解的解決方案,足以使其適應我的特殊問題。編譯時,我的應用程序將運行良好,並做我希望它「正確」做的所有事情(除了一個小工具,但我會後來哈哈)。
的一件事它沒有做到的是開放的,我關閉後,其正確。我可以進入主屏幕並返回到應用程序,但如果我完全關閉應用程序並嘗試重新打開,則表示它「一直停止」。
現在,我認爲這將是給你我的代碼(也有在此應用程序只有兩個活動),我的「logcat的」有用。然而,我目前正試圖讀取和理解如何檢索我的「logcat」在第一個地方哈哈,所以希望我會很快在這裏。
從我讀我的理解是,我的問題是,要麼我聲明瞭全局變量或東西與按鈕ID時,我做的按鈕動態的。我遇到了與他們的「主題」有關的人,但我無法將其與我的特定位置相關聯。但是,如果這些問題中的任何一個是問題,我很難理解問題實際上是什麼。
這裏是我的主要活動......
package com.example.getcoins;
import android.content.Intent;
import android.icu.text.DecimalFormat;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.jjoe64.graphview.GraphView;
import com.jjoe64.graphview.series.DataPoint;
import com.jjoe64.graphview.series.PointsGraphSeries;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
int intialCoins = 21;
int coins;
int buttonColor = android.graphics.Color.rgb(0, 150, 150);
int textColor = android.graphics.Color.rgb(255, 255, 255);
ArrayList<Integer> coinsOverTime = new ArrayList<Integer>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(myToolbar);
Intent intent = getIntent();
coins = intent.getIntExtra("COINS", 1);
if (intent.getExtras() != null)
{
Boolean winner = intent.getBooleanExtra("WINNER", true);
int gambleamount = intent.getIntExtra("GAMBLE", 1);
Bundle bundle = intent.getExtras();
coinsOverTime = bundle.getIntegerArrayList("COIN_HISTORY");
if (winner == true)
{
coins = coins + gambleamount;
coinsOverTime.add(coins);
}
if (winner == false && gambleamount == 1)
{
coins = coins;
coinsOverTime.add(coins);
}
else if(winner == false)
{
coins = coins - gambleamount;
coinsOverTime.add(coins);
}
}
else
{
coins = intialCoins;
coinsOverTime.add(coins);
}
String number = Integer.toString(coins);
double amount = Double.parseDouble(number);
DecimalFormat formatter = new DecimalFormat("#,###");
String formatted = formatter.format(amount);
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(formatted);
GraphView graph = (GraphView) findViewById(R.id.graph);
PointsGraphSeries<DataPoint> series = new PointsGraphSeries<>(generateData());
graph.addSeries(series);
series.setShape(PointsGraphSeries.Shape.POINT);
graph.getViewport().setXAxisBoundsManual(true);
graph.getViewport().setMinX(0);
graph.getViewport().setMaxX(coinsOverTime.size());
if (coins >= 0 && coins < 101)
{
Button getCoinButton = addButton("Get 1 coin");
getCoinButton.setId(R.id.one);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getOneCoin(v);
}
});
}
if (coins >= 11 && coins < 501)
{
Button getCoinButton = addButton("Get 10 coins");
getCoinButton.setId(R.id.ten);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getTenCoins(v);
}
});
}
if (coins >= 21 && coins < 2001)
{
Button getCoinButton = addButton("Get 20 coins");
getCoinButton.setId(R.id.twenty);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getTwentyCoins(v);
}
});
}
if (coins >= 101 && coins < 5001)
{
Button getCoinButton = addButton("Get 100 coins");
getCoinButton.setId(R.id.one_hundred);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getOneHundredCoins(v);
}
});
}
if (coins >= 501 && coins < 10001)
{
Button getCoinButton = addButton("Get 500 coins");
getCoinButton.setId(R.id.five_hundred);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getFiveHundredCoins(v);
}
});
}
if (coins >= 2001)
{
Button getCoinButton = addButton("Get 2,000 coins");
getCoinButton.setId(R.id.two_thousand);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getTwoThousandCoins(v);
}
});
}
if (coins >= 5001)
{
Button getCoinButton = addButton("Get 5,000 coins");
getCoinButton.setId(R.id.five_thousand);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getFiveThousandCoins(v);
}
});
}
if (coins >= 10001)
{
Button getCoinButton = addButton("Get 10,000 coins");
getCoinButton.setId(R.id.ten_thousand);
getCoinButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
getTenThousandCoins(v);
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.action_items, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.rules:
// User chose the "Settings" item, show the app settings UI...
return true;
case R.id.action_settings:
// User chose the "Favorite" action, mark the current item
// as a favorite...
return true;
case android.R.id.home:
return true;
default:
// If we got here, the user's action was not recognized.
// Invoke the superclass to handle it.
return super.onOptionsItemSelected(item);
}
}
public void getOneCoin(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 1);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getTenCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 10);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getTwentyCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 20);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getOneHundredCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 100);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getFiveHundredCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 500);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getTwoThousandCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 2000);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getFiveThousandCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 5000);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void getTenThousandCoins(View view){
Intent intent = new Intent(this, gamble.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinsOverTime);
intent.putExtra("GAMBLE", 10000);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public Button addButton(String name)
{
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linearLayout);
Button newCoinButton = new Button(this);
newCoinButton.setText(name);
newCoinButton.setTextSize(30);
//newCoinButton.setBackgroundColor(buttonColor);
newCoinButton.setTextColor(textColor);
//newCoinButton.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
linearLayout.addView(newCoinButton);
return newCoinButton;
}
public DataPoint[] generateData()
{
int size = coinsOverTime.size();
DataPoint[] values = new DataPoint[size];
for (int i=0; i<size; i++)
{
int y1 = coinsOverTime.get(i);
DataPoint v = new DataPoint(i, y1);
values[i] = v;
}
return values;
}
}
和這裏的賭博活動也會談...
package com.example.getcoins;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
public class gamble extends AppCompatActivity {
ArrayList<Integer> buttonValues = getButtonValues();
//ArrayList<Integer> coinHistory = getCoinHistory();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gamble);
Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(myToolbar);
ActionBar ab = getSupportActionBar();
ab.setDisplayHomeAsUpEnabled(false);
TextView textViewLeft = (TextView) findViewById(R.id.textView2);
TextView textViewRight = (TextView) findViewById(R.id.textView3);
TextView textViewCoins = (TextView) findViewById(R.id.textView4);
textViewCoins.setText("Good Luck!");
if (buttonValues.get(0) == 0)
{
textViewLeft.setText("Winner");
}
else
{
textViewLeft.setText("Loser");
}
if (buttonValues.get(1) == 0)
{
textViewRight.setText("Winner");
}
else
{
textViewRight.setText("Loser");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.action_items, menu);
return true;
}
public ArrayList<Integer> getButtonValues()
{
ArrayList<Integer> buttonvalues = new ArrayList<Integer>();
buttonvalues.add(0);
buttonvalues.add(1);
Collections.shuffle(buttonvalues);
return buttonvalues;
}
public void leftButtonClick(View view)
{
if (buttonValues.get(0) == 0)
{
winner();
}
else
{
loser();
}
}
public void rightButtonClick(View view)
{
if (buttonValues.get(1) == 0)
{
winner();
}
else
{
loser();
}
}
public void winner()
{
Intent oldintent = getIntent();
Bundle oldbundle = oldintent.getExtras();
int gambleamount = oldintent.getIntExtra("GAMBLE", 1);
int coins = oldintent.getIntExtra("COINS", 1);
ArrayList<Integer> coinHistory = oldbundle.getIntegerArrayList("COIN_HISTORY");
Intent intent = new Intent(this, MainActivity.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinHistory);
intent.putExtra("WINNER", true);
intent.putExtra("GAMBLE", gambleamount);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
public void loser()
{
Intent oldintent = getIntent();
Bundle oldbundle = oldintent.getExtras();
int gambleamount = oldintent.getIntExtra("GAMBLE", 1);
int coins = oldintent.getIntExtra("COINS", 1);
ArrayList<Integer> coinHistory = oldbundle.getIntegerArrayList("COIN_HISTORY");
Intent intent = new Intent(this, MainActivity.class);
Bundle bundle = new Bundle();
bundle.putIntegerArrayList("COIN_HISTORY", coinHistory);
intent.putExtra("WINNER", false);
intent.putExtra("GAMBLE", gambleamount);
intent.putExtra("COINS", coins);
intent.putExtras(bundle);
startActivity(intent);
}
}
我感謝所有幫助任何人都可能能夠提供。
盧克
更新:這是我的logcat的......或者至少是我認爲這是相關部分。一旦發生事故,我抓住了它給我的文字。
04-06 16:10:39.091 3897-3897/? I/art: Late-enabling -Xcheck:jni
04-06 16:10:39.322 3897-3897/com.example.getcoins W/System: ClassLoader referenced unknown path: /data/app/com.example.getcoins-1/lib/arm64
04-06 16:10:39.363 3897-3897/com.example.getcoins I/InstantRun: Starting Instant Run Server for com.example.getcoins
04-06 16:10:42.158 3897-3897/com.example.getcoins W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
04-06 16:10:42.643 3897-3897/com.example.getcoins D/AndroidRuntime: Shutting down VM
04-06 16:10:42.645 3897-3897/com.example.getcoins E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.getcoins, PID: 3897
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.getcoins/com.example.getcoins.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.util.ArrayList.add(java.lang.Object)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2671)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2736)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6154)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.util.ArrayList.add(java.lang.Object)' on a null object reference
at com.example.getcoins.MainActivity.onCreate(MainActivity.java:50)
at android.app.Activity.performCreate(Activity.java:6683)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2624)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2736)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6154)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
UPDATE:
首先,感謝您的答覆!這對我來說非常有教育意義!我想按照我目前的想法運行,看看我是否在正確的軌道上。看起來,當應用程序首次編譯到我的手機上時,一切都可以(即主要活動中的全局變量可以正確查看和處理)。
然而,看着鏈接後帕維爾B.建議我看看,好像是通過這個過程...... A simplified illustration of the activity lifecycle.
......一旦我終止該應用並打開它回來了,它會直接到onCreate()方法(並且似乎跳過了上面定義的全局變量)。這是怎麼回事?
我投了評論,我發現有用的,但它說,因爲我的名聲小於15也不會公開。
再次謝謝你太棒了!
盧克
讓我們解決您的問題的最簡單方法是分享您的日誌貓。 –
您可以在左側屏幕底部的欄中點擊_Android Monitor_,以查看logcat – Sunshinator
謝謝Sunshinator指引我找到logcat的正確方向。我已經把它貼在上面了! –