带有参数和按钮的简单Android幻灯片
我是android的新手:) 我想用一个数字参数(x)和一个按钮创建一个简单的幻灯片。我有21个图像,点击按钮,我想捕捉x并“滑动”列表中的前x个图像。在一个图像和下一个图像之间,我想等待1秒 最后,我想知道手术过程中经过了多少时间。(对不起我的英语) 在活动和布局的代码下方粘贴:带有参数和按钮的简单Android幻灯片,android,slideshow,out-of-memory,Android,Slideshow,Out Of Memory,我是android的新手:) 我想用一个数字参数(x)和一个按钮创建一个简单的幻灯片。我有21个图像,点击按钮,我想捕捉x并“滑动”列表中的前x个图像。在一个图像和下一个图像之间,我想等待1秒 最后,我想知道手术过程中经过了多少时间。(对不起我的英语) 在活动和布局的代码下方粘贴: package com.superpibenchmarknative; import android.app.Activity; import android.os.Bundle; import android.o
package com.superpibenchmarknative;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
public class ImageActivity extends Activity implements OnClickListener {
private Button start;
private EditText iteractions;
private TextView time;
private ImageView display;
private long after,before;
private int images[] = {R.drawable.image1,R.drawable.image2,R.drawable.image3,
R.drawable.image4,R.drawable.image5,R.drawable.image6,R.drawable.image7,
R.drawable.image8,R.drawable.image9,R.drawable.image10,R.drawable.image11,
R.drawable.image12,R.drawable.image13,R.drawable.image14,R.drawable.image15,
R.drawable.image16,R.drawable.image17,R.drawable.image18,R.drawable.image19,
R.drawable.image20,R.drawable.image21,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image);
setUpUI();
}
private void setUpUI() {
// TODO Auto-generated method stub
start = (Button) findViewById(R.id.bntStartCalcolation);
iteractions = (EditText) findViewById(R.id.etIterations);
time = (TextView) findViewById(R.id.tvTime);
start.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
//Creo le imageview in base al # di iteractions
before = System.currentTimeMillis();
for (int j = 0; j < Integer.parseInt(iteractions.getText().toString());j++){
display = (ImageView) findViewById(R.id.ivDisplay);
display.setImageResource(images[j]);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
display = null;
System.gc();
}
}, 1000);
}
display = null;
System.gc();
after = System.currentTimeMillis();
time.setText(String.valueOf(after-before-1000* Integer.parseInt(iteractions.getText().toString())));
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context=".ImageActivity" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="10dp"
android:padding="5dp"
android:text="Benchmark del rendering di immagini" />
<EditText
android:id="@+id/etIterations"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:hint="# di iterazioni"
android:inputType="number"
android:padding="5dp" />
<Button
android:id="@+id/bntStartCalcolation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
android:text="Start Calcolation" />
<ImageView android:id="@+id/ivDisplay"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="100" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:layout_weight="50"
android:text="Risultato ottenuto in: " />
<TextView
android:id="@+id/tvTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:layout_weight="50" />
</LinearLayout>
package com.superpibenchmarkinate;
导入android.app.Activity;
导入android.os.Bundle;
导入android.os.Handler;
导入android.view.view;
导入android.view.view.OnClickListener;
导入android.widget.Button;
导入android.widget.EditText;
导入android.widget.ImageView;
导入android.widget.TextView;
公共类ImageActivity扩展活动实现OnClickListener{
私人按钮启动;
私人编辑;
私有文本查看时间;
私有图像视图显示;
私人很久以前;
私有int-images[]={R.drawable.image1,R.drawable.image2,R.drawable.image3,
R.drawable.image4,R.drawable.image5,R.drawable.image6,R.drawable.image7,
R.drawable.image8,R.drawable.image9,R.drawable.image10,R.drawable.image11,
R.drawable.image12,R.drawable.image13,R.drawable.image14,R.drawable.image15,
R.drawable.image16,R.drawable.image17,R.drawable.image18,R.drawable.image19,
R.drawable.image20,R.drawable.image21,
};
@凌驾
创建时受保护的void(Bundle savedInstanceState){
//TODO自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u图像);
setUpUI();
}
私有void setUpUI(){
//TODO自动生成的方法存根
开始=(按钮)findViewById(R.id.bntStartCalcolation);
iteractions=(EditText)findViewById(R.id.etitorations);
时间=(TextView)findViewById(R.id.tvTime);
start.setOnClickListener(this);
}
@凌驾
公共void onClick(视图arg0){
//基本图像中的Creo le imageview
before=System.currentTimeMillis();
对于(int j=0;j
这是布局图:
package com.superpibenchmarknative;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
public class ImageActivity extends Activity implements OnClickListener {
private Button start;
private EditText iteractions;
private TextView time;
private ImageView display;
private long after,before;
private int images[] = {R.drawable.image1,R.drawable.image2,R.drawable.image3,
R.drawable.image4,R.drawable.image5,R.drawable.image6,R.drawable.image7,
R.drawable.image8,R.drawable.image9,R.drawable.image10,R.drawable.image11,
R.drawable.image12,R.drawable.image13,R.drawable.image14,R.drawable.image15,
R.drawable.image16,R.drawable.image17,R.drawable.image18,R.drawable.image19,
R.drawable.image20,R.drawable.image21,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image);
setUpUI();
}
private void setUpUI() {
// TODO Auto-generated method stub
start = (Button) findViewById(R.id.bntStartCalcolation);
iteractions = (EditText) findViewById(R.id.etIterations);
time = (TextView) findViewById(R.id.tvTime);
start.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
//Creo le imageview in base al # di iteractions
before = System.currentTimeMillis();
for (int j = 0; j < Integer.parseInt(iteractions.getText().toString());j++){
display = (ImageView) findViewById(R.id.ivDisplay);
display.setImageResource(images[j]);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
display = null;
System.gc();
}
}, 1000);
}
display = null;
System.gc();
after = System.currentTimeMillis();
time.setText(String.valueOf(after-before-1000* Integer.parseInt(iteractions.getText().toString())));
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context=".ImageActivity" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="10dp"
android:padding="5dp"
android:text="Benchmark del rendering di immagini" />
<EditText
android:id="@+id/etIterations"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:hint="# di iterazioni"
android:inputType="number"
android:padding="5dp" />
<Button
android:id="@+id/bntStartCalcolation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
android:text="Start Calcolation" />
<ImageView android:id="@+id/ivDisplay"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="100" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:layout_weight="50"
android:text="Risultato ottenuto in: " />
<TextView
android:id="@+id/tvTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:layout_weight="50" />
</LinearLayout>
这段代码不起作用,它创建了一个异常
OutOfMemoryError:位图大小超出vm预算
谁能帮我解决这个问题??)无论如何,谢谢你
一切都很好:D但我还有一点问题
我不明白为什么时间总是消极的!!!
你们谁知道为什么??[postDelayed不起作用?!?:(]
解决方法:安卓系统、操作系统、系统时钟、睡眠(1000);
另一个错误,图像视图在设置图像后没有更改,任何建议???将大堆添加到清单文件中的应用程序中
<application ... android:largeHeap="true" >
查找Android屏幕分辨率。开发者网站上有一个关于加载大型位图文件的小指南。其想法是加载分辨率较低的文件,以便将其放入内存中: