ANDROID：通過單擊按鈕開始新活動
[英]ANDROID:starting new activities from button click
問題描述
我是android開發的新手，所以請幫我：
我有一個帶有7個按鈕的xml文件，命名為：btn_1 btn_2，... btn_7
這是activity_main.xml
<Button
android:layout_width="103dp"
android:layout_height="82dp"
android:id="@+id/btn_1"
android:layout_below="@+id/heading1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="@mipmap/pic1"
style="@style/Base.Widget.AppCompat.Button.Borderless"
android:clickable="true" />
這是MainActivity.java-
public class MainActivity extends AppCompatActivity {
private static Button btn1, btn2, btn3, btn4, btn5, btn6, btn7;
@
Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OnClickButtonListener();
}
public void OnClickButtonListener() {
btn1 = (Button) findViewById(R.id.btn_1);
btn1.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_1 = new Intent(MainActivity.this, MainActivity_1.class);
startActivity(intent_1);
}
});
btn2 = (Button) findViewById(R.id.btn_2);
btn2.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_2 = new Intent(MainActivity.this, MainActivity_2.class);
startActivity(intent_2);
}
});
btn3 = (Button) findViewById(R.id.btn_3);
btn3.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_3 = new Intent(MainActivity.this, MainActivity_3.class);
startActivity(intent_3);
}
});
btn4 = (Button) findViewById(R.id.btn_4);
btn4.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_4 = new Intent(MainActivity.this, MainActivity_4.class);
startActivity(intent_4);
}
});
btn5 = (Button) findViewById(R.id.btn_5);
btn5.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_5 = new Intent(MainActivity.this, MainActivity_5.class);
startActivity(intent_5);
}
});
btn6 = (Button) findViewById(R.id.btn_6);
btn6.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_6 = new Intent(MainActivity.this, MainActivity_6.class);
startActivity(intent_6);
}
});
btn7 = (Button) findViewById(R.id.btn_7);
btn7.setOnClickListener(new View.OnClickListener() {@
Override
public void onClick(View v) {
Intent intent_7 = new Intent(MainActivity.this, MainActivity_7.class);
startActivity(intent_7);
}
});
}
}
當我單擊按鈕時，應用程序崩潰，但令人驚訝的是並非總是如此。 同樣，在一次嘗試中單擊btn_6會使其崩潰，然后在下一次嘗試（當我重新打開應用程序時）時，按下另一個按鈕（現在說按鈕5）會崩潰。
現在，如果我關閉該應用程序，然后重試，則按btn_3可能會崩潰，盡管在上一次嘗試中本來可以正常工作。
有什么見解嗎？ 謝謝。
這是最新的logCat：
05-25 23:43:17.139 17042-17042 <XX> W/ <YY>: VFY: unable to resolve virtual method 134: Landroid/app/Activity;.onEnterAnimationComplete ()V
05-25 23:43:17.139 17042-17042 <XX> D/ <YY>: VFY: replacing opcode 0x6f at 0x140b
05-25 23:43:17.179 17042-17042 <XX> D/ <YY>: GC_FOR_ALLOC freed 345K, 3% free 54952K/56516K, paused 15ms, total 16ms
05-25 23:43:17.179 17042-17042 <XX> I/ <YY>-heap: Forcing collection of SoftReferences for 11040016-byte allocation
05-25 23:43:17.199 17042-17042 <XX> D/ <YY>: GC_BEFORE_OOM freed 3K, 3% free 54948K/56516K, paused 22ms, total 22ms
05-25 23:43:17.199 17042-17042 <XX> E/ <YY>-heap: Out of memory on a 11040016-byte allocation.
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: "main" prio=5 tid=1 RUNNABLE
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: | group="main" sCount=0 dsCount=0 obj=0x41e4f578 self=0x41e3a4e8
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: | sysTid=17042 nice=-16 sched=0/0 cgrp=apps handle=1074368508
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: | state=R schedstat=( 3391699451 331158977 2372 ) utm=269 stm=70 core=0
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:596)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:832)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.content.res.Resources.loadDrawable(Resources.java:2988)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.view.View.<init>(View.java:3563)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.widget.TextView.<init>(TextView.java:881)
05-25 23:43:17.199 17042-17042 <XX> I/ <YY>: at android.widget.Button.<init>(Button.java:108)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:62)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:58)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:105)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:972)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:1030)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:690)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:276)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:136)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at abcpqr.red.MainActivity_1.onCreate(MainActivity_1.java:21)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.Activity.performCreate(Activity.java:5372)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.ActivityThread.access$700(ActivityThread.java:159)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.os.Handler.dispatchMessage(Handler.java:99)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.os.Looper.loop(Looper.java:176)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at android.app.ActivityThread.main(ActivityThread.java:5419)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at java.lang.reflect.Method.invokeNative(Native Method)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at java.lang.reflect.Method.invoke(Method.java:525)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
05-25 23:43:17.204 17042-17042 <XX> I/ <YY>: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
05-25 23:43:17.209 17042-17042 <XX> I/ <YY>: at dalvik.system.NativeStart.main(Native Method)
05-25 23:43:17.209 17042-17042 <XX> D/skia: --- decoder->decode returned false
05-25 23:43:17.209 17042-17042 <XX> D/AndroidRuntime: Shutting down VM
05-25 23:43:17.209 17042-17042 <XX> W/ <YY>: threadid=1: thread exiting with uncaught exception (group=0x41e4e700)
05-25 23:43:17.209 17042-17042 <XX> E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:596)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:832)
at android.content.res.Resources.loadDrawable(Resources.java:2988)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.view.View.<init>(View.java:3563)
at android.widget.TextView.<init>(TextView.java:881)
at android.widget.Button.<init>(Button.java:108)
at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:62)
at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:58)
at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:105)
at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:972)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:1030)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:690)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:276)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:136)
at abcpqr.red.MainActivity_1.onCreate(MainActivity_1.java:21)
at android.app.Activity.performCreate(Activity.java:5372)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
at android.app.ActivityThread.access$700(ActivityThread.java:159)
t android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at dalvik.system.NativeStart.main(Native Method)
05-25 23:43:25.074 17042-17042 <XX> I/Process: Sending signal. PID: 17042 SIG: 9
這是我的xml的要點：
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:ads="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="xxx.MainActivity"> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_inside" android:layout_below="@+id/LL_subheading1" android:layout_centerHorizontal="true" android:background="@mipmap/pic_small_inside" style="@style/Widget.AppCompat.Button.Borderless" android:clickable="true"/> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_on_the_side1" android:layout_below="@+id/LL_subheading2" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:background="@mipmap/pic_small_on_the_side1" style="@style/Base.Widget.AppCompat.Button.Borderless" android:clickable="true"/> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_on_the_side3" android:layout_below="@+id/LL_subheading2" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" android:background="@mipmap/pic_small_on_the_side3" style="@style/Base.Widget.AppCompat.Button.Borderless" android:clickable="true"/> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_on_the_side2" android:layout_alignTop="@+id/btn_on_the_side1" android:layout_centerHorizontal="true" android:background="@mipmap/pic_small_on_the_side2" style="@style/Base.Widget.AppCompat.Button.Borderless" android:clickable="true"/> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_outside1" android:layout_below="@+id/LL_subheading3" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:background="@mipmap/pic_small_outside1" style="@style/Base.Widget.AppCompat.Button.Borderless" android:clickable="true"/> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_outside2" android:layout_below="@+id/LL_subheading3" android:layout_centerHorizontal="true" android:background="@mipmap/pic_small_outside2" style="@style/Base.Widget.AppCompat.Button.Borderless" android:clickable="true"/> <Button android:layout_width="103dp" android:layout_height="82dp" android:id="@+id/btn_outside3" android:layout_below="@+id/LL_subheading3" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" android:background="@mipmap/pic_small_outside3" style="@style/Base.Widget.AppCompat.Button.Borderless" android:clickable="true"/> </RelativeLayout>
5 個解決方案
解決方案1
0 2016-05-23 22:01:13
請使用下面的代碼並檢查
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button btn1, btn2, btn3, btn4, btn5, btn6, btn7;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button) findViewById(R.id.btn_1);
btn2 = (Button) findViewById(R.id.btn_2);
btn3 = (Button) findViewById(R.id.btn_3);
btn4 = (Button) findViewById(R.id.btn_4);
btn5 = (Button) findViewById(R.id.btn_5);
btn6 = (Button) findViewById(R.id.btn_6);
btn7 = (Button) findViewById(R.id.btn_7);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
btn3.setOnClickListener(this);
btn4.setOnClickListener(this);
btn5.setOnClickListener(this);
btn6.setOnClickListener(this);
btn7.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.btn_1:
Intent intent_1 = new Intent(MainActivity.this, MainActivity_1.class);
startActivity(intent_1);
break;
case R.id.btn_2:
Intent intent_2 = new Intent(MainActivity.this, MainActivity_2.class);
startActivity(intent_2);
break;
...
case R.id.btn_7:
Intent intent_7 = new Intent(MainActivity.this, MainActivity_7.class);
startActivity(intent_7);
break;
}
}
}
解決方案2
0 2016-05-23 22:04:13
首先，讓我給您一些建議。 重新安排代碼，以免通過以下方式浪費屏幕創建時間（OnCreate方法）：
設計（xml）按鈕應具有onclick屬性，例如：
<Button android:id="@+id/button"
android:onClick="onClickButton"
android:text="Awesome" />
然后為每個按鈕創建一個方法：
public void onClickButton(View v){
// Code to run after button click
}
此方法需要返回void並具有一個參數視圖。
為了幫助您解決錯誤，我需要出現在android監視器上的logcat。 您只需要將手機連接到PC並在開發環境中運行該應用即可。
解決方案3
0 2016-05-25 23:35:15
您使用大圖像，並且設備內存不足。 請檢查您的圖片大小。 並分享您的Xml布局
解決方案4
0 2016-05-26 00:44:13
您將收到OutOfMemoryException 。 看到你的
android.graphics.BitmapFactory.logcatjava.lang.OutOfMemoryErrorandroid.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
問題是您正在按鈕上創建新活動，單擊活動繁重，而且您正在從資產文件夾中將位圖加載到這些活動中。 帶有大量位圖的新活動實例導致錯誤。
解決方案：將活動替換為片段，然后使用Glide或Picasso加載圖像。
注意：從現在開始，如果App崩潰，則嘗試在logcat中搜索“致命”，該日志將包含錯誤說明。
解決方案5
0 2017-03-08 14:34:39
您收到的錯誤可能是由於
1.使用大尺寸圖像
2.從一個活動轉移到另一個活動后，您應該始終完成上一個活動以釋放一些內存。
3.每當您開始在應用中使用更多圖片時，都應在Android清單文件中為應用設置android:largeHeap="true"
將按鈕單擊時的數據從五個活動傳遞到android中的一個活動
[英]Passing data on button click from five activities to one activity in android
如何從另一個活動按鈕單擊更改android中的textViews可見性？
[英]How to change a textViews visibility from another activities button click in android?
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