我在Android中制作了一个简单的计时器应用,就像每当通过10秒时,它都会给出消息"完成!!!" 。
在text view
(计划添加哔哔声(中,并在另一个文本视图中显示CountdownTimer
。但是我注意到我的应用在Nexus模拟器上运行得很好,然后坠毁在像素模拟器上
也一直在我的真实手机上崩溃(Redmi Note 4(,
这样做的原因是什么?
我的代码:
package com.example.pickachu.timerapp;
import android.media.MediaPlayer;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import java.sql.Time;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView time=(TextView)findViewById(R.id.Time);
final TextView Status =(TextView)findViewById(R.id.Status);
new CountDownTimer(10000, 1000) {
@Override
public void onTick(long l) {
time.setText("SEC : "+String.valueOf(l/1000));
}
@Override
public void onFinish() {
Status.setText("DONE!!!");
time.setText("SEC : 0");
}
}.start();
}
}
XML代码:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/clock"
android:backgroundTint="@android:color/background_light"
tools:context="com.example.pickachu.timerapp.MainActivity">
<ImageView
android:id="@+id/imageView"
android:layout_width="0dp"
android:layout_height="0dp"
android:contentDescription="@string/app_name"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:srcCompat="@drawable/clock" />
<TextView
android:id="@+id/Time"
android:layout_width="188dp"
android:layout_height="62dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:background="@android:color/background_dark"
android:paddingTop="12sp"
android:text="@string/Time"
android:textAlignment="center"
android:textColor="#ffffff"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="@+id/imageView"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.369" />
<TextView
android:id="@+id/Status"
android:layout_width="105dp"
android:layout_height="48dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:paddingTop="11sp"
android:text="@string/Status"
android:textAlignment="center"
android:textColor="#ffffff"
android:textSize="18sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.501"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.567"
tools:text="@string/Status" />
</android.support.constraint.ConstraintLayout>
logcat错误消息:
02-05 10:49:51.001 4637-4637/com.example.pickachu.timerapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.pickachu.timerapp, PID: 4637
java.lang.RuntimeException: Canvas: trying to draw too large(128399328bytes) bitmap.
at android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:260)
at android.graphics.Canvas.drawBitmap(Canvas.java:1415)
at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:528)
at android.view.View.getDrawableRenderNode(View.java:17428)
at android.view.View.drawBackground(View.java:17364)
at android.view.View.draw(View.java:17176)
at android.view.View.updateDisplayListIfDirty(View.java:16167)
at android.view.View.draw(View.java:16951)
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
at android.view.View.updateDisplayListIfDirty(View.java:16162)
at android.view.View.draw(View.java:16951)
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
at android.view.View.updateDisplayListIfDirty(View.java:16162)
at android.view.View.draw(View.java:16951)
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
at android.view.View.updateDisplayListIfDirty(View.java:16162)
at android.view.View.draw(View.java:16951)
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
at android.view.View.updateDisplayListIfDirty(View.java:16162)
at android.view.View.draw(View.java:16951)
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
at android.view.View.draw(View.java:17188)
at com.android.internal.policy.DecorView.draw(DecorView.java:753)
at android.view.View.updateDisplayListIfDirty(View.java:16167)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:648)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:654)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:762)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2800)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2608)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2215)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6337)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
at android.view.Choreographer.doCallbacks(Choreographer.java:686)
at android.view.Choreographer.doFrame(Choreographer.java:621)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
图像
尝试这个...
因为您的真实手机在运行时很难找到屏幕的可绘制图像。将图像放置在电话的分辨率(可绘制(文件夹中。如果您通过所有设备运行应用程序,则应将图像添加到所有分辨率(可绘制(文件夹中。将可绘制的图像放在drawable-xxhdpi
文件夹中。
我想,我使用的图像存在一些问题。我刚刚更换了图像,它工作正常。所以现在,任何人都可以向我解释一下问题。
以及如何在将来解决此类问题。预先感谢...
减小图像大小。它将起作用
尝试更改工具:text ="@string/state"到android:text ="@string/state" for textView"@ id/status"。
删除app:srccompat ="@drawable/clock"从imageView中您已经将背景设置为布局。